Opinion by Judge MANELLA; Partial Concurrence and Partial Dissent by Judge KLEINFELD.

Appellants Jeffrey M. Herman and Stuart S. Mermelstein are attorneys with the law firm of Herman Grubman & Moore in Miami, Florida. They appeal the district court’s order (“Order dated June 3, 1998”), barring both attorneys from appearing pro hac vice before Malcolm F. Marsh, District Judge for the District of Oregon, and requiring any member of their law firm to attach copies of Judge Marsh’s sanction order when petitioning for pro hac vice admission. We have jurisdiction of this appeal of a post-judgment order under 28 U.S.C. § 1291 , and we affirm in part and vacate in part.

I

FACTUAL AND PROCEDURAL BACKGROUND

Appellee Pacific Harbor Capital, Inc. (“Pacific Harbor”) leased an airplane and related equipment to defendant Carnival Airlines, Inc. (“Carnival”). Carnival fell behind on its payments, and on June 17, 1997 Pacific Harbor brought suit in the District of Oregon for breach of the lease and recovery of the airplane.

A few weeks later, on July 3, 1997, Carnival, through its attorneys, appellants Herman and Mermelstein, filed for and obtained a temporary restraining order (“TRO”) from a Florida state court judge prohibiting Pacific Harbor from asserting any possessory rights or interest in the airplane. Herman and Mermelstein sought the Florida TRO ex parte, without attempting to notify Pacific Harbor. The two attorneys also failed to inform the Florida state court judge that the Oregon action was pending, that their client, Carnival, was behind in its lease payments, or that the lease had a forum selection clause designating Oregon as the venue for any dispute.

Once Pacific Harbor learned of the Florida TRO, it removed the case to federal court. On July 10, the Florida district court dissolved the TRO and transferred the case to the District of Oregon.

On Friday, July 11, Pacific Harbor moved for its own TRO to preclude Carnival from continuing to fly the plane. Judge Marsh, district judge for the District of Oregon, heard the matter that afternoon. Carnival was represented by local counsel, Keith Ketterling, and Herman, who appeared telephonically. Following argument, the district court granted the TRO as to the airplane, two engines, and all logs, manuals, certificates, and technical data pertaining to the airplane and the engines. The TRO prohibited Carnival from using Pacific Harbor’s airplane, engines, and parts and further required Carnival to assemble the airplane promptly at one of Carnival’s primary maintenance facilities in Fort Lauderdale, Florida. The court required Pacific Harbor to post a bond of $250,000 as a condition of the TRO. Pacific Harbor’s attorney had a bond for $2,000,000 that he posted immediately and was given permission to replace it the following Monday with a bond for $250,000.

During the hearing on the application for the TRO, Judge Marsh stated on four separate occasions that the TRO was granted and was effective as of that date. The four statements made by Judge Marsh included: 1) “I am going to enter the TRO,”; 2) “[a]t this time I am going to sign this TRO,”; 3) “the TRO is in effect,”; and 4) “I will direct that [the] TRO is now in [ejffect.” 3

*1115 The order granting the TRO was dated Friday, July 11, 1997 and stated that it was effective upon service by facsimile on defendant’s counsel in Miami, Florida. At no time during the hearing did Herman express confusion over, or seek clarification of, the effective date of the TRO.

Despite the court order, Carnival continued to use the plane and engine for commercial purposes throughout the weekend following issuance of the TRO. On Monday, July 14, plaintiff filed a motion for contempt, citing Carnival’s continued use of the plane on Saturday, Sunday, and Monday and the continuing failure to return the engines and documentation as ordered. 4 On Wednesday, July 16, the district court conducted a hearing on plaintiffs contempt motion. Messrs. Herman and Mermelstein appeared telephonically. At the hearing, Herman advised the court that he had misunderstood when the TRO was to go into effect and was under the impression that the TRO would not be effective until Monday, July 14. 5 When questioned by Judge Marsh, Carnival’s local counsel, Ketterling, acknowledged that he had understood the TRO to be effective as of the date of the motion hearing, Friday, July 11. The judge made clear he did not believe Herman’s explanation. 6

As of Wednesday, July 16, Carnival still had not complied with the terms of the TRO. The two engines and the documentation pertaining to the aircraft had not been delivered to Fort Lauderdale. However, Herman assured the court that he was trying to get the engines to Fort Lauder-dale and stated “[w]e can do the exchange [of the engines] on Friday.” The court found Carnival in contempt of the court’s TRO as to the airplane and scheduled a show cause hearing for Friday, July 18, concerning the engines and airplane documentation. Pacific Harbor’s attorney requested that “the Court make it perfectly clear in its order that the engines are not to be used for any purpose.” The court did so. The court also ordered the Florida attorneys to appear personally for the Friday hearing, along with Carnival’s CEO or the person directly responsible for compliance with the TRO.

Herman did not appear at the Friday, July 18 show cause hearing, but Mermel-stein did. Tom Fay, chief pilot for Carnival and manager of its A300 fleet, was also *1116 present. A week after the TRO had been granted and despite Herman’s previous assurances to the court, Carnival still had not complied with the TRO. Neither the two engines nor the airplane documentation had been returned to Pacific Harbor. At the Friday hearing, Mermelstein argued that it was “an impossibility” for Carnival to comply with the terms of the TRO, and that a third company, Babcock & Brown, was conspiring with Pacific Harbor to “thwart” Carnival’s efforts to comply with the TRO. 7

Carnival’s chief pilot, Mr. Fay, confirmed that the two airplanes to which Pacific Harbor’s engines were attached had been in use since the Wednesday contempt hearing to fly revenue passengers from New York to Los Angeles, San Juan and the Bahamas. Judge Marsh thereupon questioned Mermelstein’s credibility, held both Mermelstein and Carnival Air in contempt, and disqualified Mermelstein from appearing in his court. Judge Marsh orally advised Mermelstein that based on his conduct, the judge would enter an order permanently banning Mermelstein and his firm from pro hac vice admission to the District of Oregon. In addition, the court warned Mermelstein and Fay that they were not to leave the District of Oregon until the TRO was fully complied with, and that they would be arrested on civil contempt charges if the engines and documentation were not produced for Pacific Harbor’s inspection by Saturday morning, July 19,1997. 8

On July 22, the district court issued a written order memorializing and narrowing the sanctions. Relying on Local Rule 110 — 2(b) and the court’s inherent power, Judge Marsh barred members of appellants’ firm from appearing pro hac vice in his court, and required appellants and other members of their firm to attach a copy of the sanctions order to any future pro hac vice application submitted in the District of Oregon. In explaining the order, Judge Marsh noted that he found defense counsel Herman’s representation concerning his understanding of the effective date of the TRO to have been made in bad faith. (The judge had made clear at the July 16 hearing that he found Herman’s explanation incredible.) The court further found that Herman and Mermelstein had effectively sanctioned their client’s violation of his court order. (Herman admitted having advised Carnival it could continue to fly the planes over the weekend; Mer-melstein claimed Carnival’s compliance with the court order had been an “impossibility” — a representation later shown to be untrue.) Finally, the court found Herman and Mermelstein’s failure to advise the Dade County court of the pending federal case in Oregon and to advise the Florida court of their client’s default on lease payments to have been in bad faith. The court concluded that defense counsel’s “frivolous arguments and misrepresentations” were more than mere technical violations — they had interfered with the court’s ability to maintain effective control over court processes.

The underlying case was dismissed without prejudice April 13, 1998, after Carnival filed for Chapter 11 protection. On April 17, appellants filed a motion for reeonsid- *1117 eration of the sanctions order and supported their motion with argument, affidavits, and other exhibits. In an affidavit supporting the motion, Herman for the first time stated that there had •been a poor telephone connection during the Friday telephonic TRO hearing, and claimed that during the hearing he had informed the court that he was having difficulty hearing some of the proceedings. 9

On June 3, 1998, after considering these arguments, the court adopted a modified sanction order that barred only Herman and Mermeistein from appearing before him. The order further required other members of appellants' firm to attach copies of the July 1997 and the June 1998 orders to any application for pro hac vice admission before him. 10 Judge Marsh based the sanction on appellants' failure to notify the Florida state court of the pending action in Oregon district court, Herman's advice to his client in contravention of the TRO, and Mermelstein's bad faith arguments alleging that compliance with the TRO was impossible. Given the judge's statement at the Friday hearing that the TRO was "in effect" and Herman's failure to seek clarification either from the judge at the hearing or from his local counsel, Judge Marsh found Herman's claim that he understood the TRO would not go into effect until the following Monday to be incredible. This appeal follows.

II

STANDARD OF REVIEW

The district court's entry of sanctions is reviewed for an abuse of discretion. Chambers v. NASCO, Inc., 501 U.S. 32, 55 , 111 S.Ct. 2123 , 115 L.Ed.2d 27 (1991); In re Keegan Management Co., 78 F.3d 431 , 436 (9th Cir.1996). We will reverse a district court's factual findings as to whether an attorney acted recklessly or in bad faith only if they are clearly erroneous. Kanarek v. Hatch, 827 F.2d 1389, 1391 (9th Cir.1987).

III

DISCUSSION

The district court issued sanctions pursuant to its inherent powers, 28 U.S.C. § 1927 . Section 1927 authorizes the imposition of sanctions against any lawyer who wrongfully proliferates litigation proceedings once a case has commenced. See *1118 Cunningham v. County of Los Angeles, 879 F.2d 481, 490 (9th Cir.1988).

The imposition of sanctions under § 1927 requires a finding of bad faith. In re Keegan Management Co., Securities Litig., 78 F.3d 431, 436 (9th Cir.1996). “We assess an attorney’s bad faith under a subjective standard. Knowing or reckless conduct meets this standard.” MGIC Indem. Corp. v. Moore, 952 F.2d 1120 , 1121-22 (9th Cir.1991) (reversal of sanctions required where district court’s “observations were as consistent with negligence as with bad faith”); see also Estate of Blas v. Winkler, 792 F.2d 858, 861 (9th Cir.1986) (observing that a finding of bad faith is crucial, because a frivolous argument by itself is insufficient to support an award of sanctions under § 1927). However, “[a] district court’s failure to make express findings [of bad faith] does not require a remand if ‘a complete understanding of the issues may be had [from the record] without the aid of separate findings.’ ” Optyl Eyewear Fashion International Corp. v. Style Companies, 760 F.2d 1045 , 1051 (9th Cir.1985) (quoting Swanson v. Levy, 509 F.2d 859, 861 (9th Cir.1975)); see also Baldwin Hardware Corp. v. Franksu Enter. Corp., 78 F.3d 550 (Fed.Cir.1996) (affirming § 1927 disciplinary and monetary sanctions, issued sua sponte, barring attorney from pro hac vice admission before court and requiring attorney to attach sanction order to any application for pro hac vice admission in the district; although court did not use words “bad faith” in imposing sanctions, record supported finding that court deemed firm’s actions underlying sanctions to be at least reckless).

In addition, “an attorney subject to discipline is entitled to procedural due process, including notice and an opportunity to be heard.” Weissman v. Quail Lodge Inc., 179 F.3d 1194, 1198 (9th Cir.1999). However, an opportunity to be heard does not require an oral or evidentiary hearing on the issue. See Baldwin Hardware, 78 F.3d at 562 (finding no due process violation for sanctions issued sua sponte after seven-week trial, where attorney had notice of court’s displeasure and opportunity to respond during trial and after court proposed sanctions; no separate hearing on sanctions required). The opportunity to brief the issue fully satisfies due process requirements. Resolution Trust Corp. v. Dabney, 73 F.3d 262, 268 (10th Cir.1995); see also Toombs v. Leone, 111 F.2d 465, 472 (9th Cir.1985) (“Due process ... requires that parties subject to sanctions have ‘sufficient opportunity to demonstrate that their conduct was not undertaken recklessly or willfully.’ ”). 11

Here, the district court made explicit findings of bad faith based on: 1) counsels’ failure to inform a Florida state court of the pending, previously filed federal action; 2) Herman’s advising his client that it could continue to fly the plane after entry of the TRO; and 3) Mermelstein’s bad faith arguments made during the second contempt hearing. Judge Marsh held that these misrepresentations and bad faith arguments violated the rules of conduct and interfered with his ability to maintain effective control over court processes. Although appellants argue to the contrary, we find neither clear error nor abuse of discretion in Judge Marsh’s assessment of counsels’ conduct.

1. Herman

As to Herman, the district court found that his justifications for advising his client that the TRO would not be in effect until Monday, July 14 — first asserting that he did not understand the court’s repeated declarations that the TRO was in effect immediately, and later claiming a poor *1119 phone connection — lacked credibility. We cannot disagree. The record shows that the court instructed the parties on four separate occasions during the Friday hearing that the TRO was in effect immediately. As Judge Marsh noted, Herman failed to explain why he ignored the judge’s repeated statements that the TRO was in effect, or why he failed to seek clarification from either the judge or his local counsel, who clearly understood the TRO to be in effect Friday. Even assuming Herman had had difficulty hearing the proceedings, his failure to seek clarification on such a critical issue was, as the court observed, “highly reckless at best.” Cf. MGIC Indem. Corp., 952 F.2d at 1122 (knowing or reckless conduct meets § 1927 standard for bad faith).

Having conducted a hearing concerning the TRO and two subsequent contempt proceedings, Judge Marsh had ample opportunity to evaluate the legitimacy of counsels’ justifications for their client’s continued non-compliance with the court’s order and Herman’s claims of good faith. We defer to Judge Marsh’s findings of fact and assessments of counsels’ credibility. See Primus Automotive Fin. Servs., Inc. v. Batarse, 115 F.3d 644, 649 (9th Cir.1997) (“The district court has ‘broad fact-finding powers’ with respect to sanctions, and its findings warrant ‘great deference’.”) (quoting Townsend v. Holman Consulting Corp., 929 F.2d 1358, 1366 (9th Cir.1990)). Accordingly, we find Judge Marsh did not clearly err in finding Herman lacked credibility or abuse his discretion in finding his conduct warranted sanctions. 12

2. Mermelstein

As to Mermelstein, the court found that his arguments that compliance with the TRO was impossible and that a third party had conspired with Pacific Harbor to thwart Carnival’s efforts to comply with the TRO were made in bad faith. Mermelstein made these arguments during the July 18 hearing, a week after the TRO went into effect and two days after he, personally, had assured the court that the engines would be returned to Fort Lauderdale immediately.

Moreover, the court found that Mermel-stein had breached his duty of candor to the court, and had unreasonably multiplied the proceedings in this matter. As this court has observed, “an attorney does not simply act as an advocate for his client; he is also an officer of the court. As such, an attorney has a duty of good faith and candor in dealing with the judiciary.” United States v. Associated Convalescent Enters. Inc., 766 F.2d 1342, 1346 (9th Cir.1985) (affirming § 1927 sanctions). Mermelstein had an opportunity during the July 16 hearing to disclose to the court any alleged barriers to compliance that his client faced. He raised no such concerns, instead assuring the court that his client would belatedly comply with the court’s order. Thus, Mermelstein further delayed compliance with the court’s order and wasted judicial resources. See Wages v. Internal Revenue Serv., 915 F.2d 1230 (9th Cir.1990) (affirming award of § 1927 sanctions against pro se litigant based on finding of bad faith in multiplying proceedings).

Moreover, Judge Marsh found Mermel-stein’s argument that his client’s compliance with the TRO had been “impossible” to be unsupported by the facts and insufficient to explain Carnival’s continued use of the engines for commercial flights. In short, Judge Marsh concluded that Mer-melstein had made misrepresentations to the court in bad faith. 13

*1120 We defer to Judge Marsh’s findings of fact and assessments of counsels’ credibility. It is undisputed that the facts did not support Mermelstein’s claim that Carnival’s compliance with the court order was “an impossibility.” Nor did they support his claim that Carnival had been “thwarted” in its attempt to comply. On the facts before him, Judge Marsh was entitled to conclude that Mermelstein’s claims were baseless and constituted misrepresentations made in bad faith, which interfered with the court’s ability to enforce its orders.

3. Due Process

Appellants also allege that they were denied procedural due process, viz., notice and an opportunity to be heard. Here, as in Baldwin, supra, the court issued sanctions sua sponte, several days after the second contempt hearing at which Judge Marsh expressed his displeasure with Mermelstein’s conduct and indicated that he intended to issue an order prospectively barring Mermelstein and members of his firm from appearing pro hac vice in the district. Although appellants were given notice of sanctions, they were not allowed, at that time, to offer explanations for their conduct. 'However, appellants subsequently filed a motion for reconsideration of the sanctions and supported their motion with argument; affidavits, and other exhibits. Judge Marsh considered appellants’ arguments and modified his original order accordingly. 14 Thus, appellants were given the opportunity to fully brief the issue, to respond to the court’s findings, and to demonstrate that their conduct was not undertaken in bad faith. Where, as here, the judge witnessed appellants’ sanctionable conduct, discussed appellants’ justifications for violating a court order during two contempt proceedings, and considered their written explanations for misconduct, a separate hearing was not required. We reject appellants’ due process challenge to the order for sanctions.

IV

CONCLUSION

For the reasons set forth above, we find no abuse of discretion and affirm the district court’s imposition of sanctions against appellants.

AFFIRMED in part AND VACATED in part.

. During the July 16 hearing, Judge Marsh reviewed the draft transcript from the July 11 TRO hearing with the parties and made corrections, including replacing the word "expect” with "direct.” The corrected sentence read, "I will direct that [the] TRO is now in [e]ffect.” This statement was followed by the statement, "And the bond will be replaced Monday morning.” Judge Marsh recalled what he had said at the prior hearing and corrected typing errors in the transcript only five days later. Given the context and the use of the present verb tense, only the corrected sentence made sense. Defendant's attorney had just asked permission to post the bond *1115 and to replace it with a bond for a lesser amount on the following Monday. Because both defendant’s attorney and Judge Marsh discussed replacing the bond on Monday, the logical conclusion was that the Judge had directed the TRO to be in effect immediately, not that he expected it to be in effect at some later date. This is the only language consistent with Judge Marsh's other statements.

. On Monday, July 14, Carnival did not fly the plane directly to Fort Lauderdale; rather Carnival flew the plane from Los Angeles to Newark, New Jersey as a Pan Am flight, with revenue passengers, and then returned to Fort Lauderdale.

. Although the July 11 transcript shows that Judge Marsh specifically noted that the $2,000,000 bond would be replaced on Monday with the required $250,000 bond, and that the TRO was in effect as of Friday, Mr. Herman, according to his affidavit, advised his client to the contrary:

Pacific Harbor’s attorney made no representation “that the bond would not be posted until Monday.” To the contrary, plaintiff’s counsel made clear his readiness to post the $2,000,000 bond that Friday, and the court granted him permission to do so and replace it with the $250,000 bond Monday. If, as Herman asserted, the bond were not to be placed until Monday, the TRO would not have been in effect, and his client’s use of the plane over the weekend would have been perfectly legal and not in the least “risky.”

.As the court put it: "All right. Now Mr. Herman.... We are having a little credibility problem here.”

. Carnival was also in default on lease payments to Babcock & Brown, which owned the two planes to which Pacific Harbor’s engines were attached. Mermelstein’s "impossibility” argument amounted to a claim that had Carnival flown the planes to Ft. Lauderdale, as ordered by the court, they might have been seized by Babcock & Brown before the engines could be removed. Mermelstein offered no evidence that Carnival had been "thwarted” in its attempts to comply with the TRO. The uncontradicted evidence was that Carnival had made no attempt to comply.

. The court's statement that Mermelstein could "stay out of custody” only on condition that he advise the Marshal of his whereabouts over the weekend, and his threat to jail Mer-melstein should his client not comply with the court order, appear to have exceeded the court’s power. Although it is unclear whether the court would have made good on its threat to jail counsel had his client not complied, conditioning a lawyer's freedom on his client’s compliance with a court order is improper. Accordingly, we vacate that portion of the court’s order.

. No statement from Mr. Herman informing the court that he was having difficulty hearing appears in the transcript from the July 11 TRO hearing.

. Both appellants and appellees assume, without discussion, that the court order barred appellants and members of their firm from appearing in any district court in Oregon. While the transcript of the hearing supports such an interpretation, the wording of "the June 1997 order and the July 1998 order following appellants' motion for reconsideration does not. The original June 22, 1997 order reads as follows:~

If the first sentence is read to bar appellants and members of their firm from appearing in any district court in Oregon, the second sentence becomes nonsensical. No attorney `permanently and prospectively barred from appearing" in the District of Oregon would have occasion to submit "any future pro hac vice applications" in that district.

The July 1998 order does not compel a different interpretation. After finding his earlier order overbroad, Judge Marsh concluded:

We interpret the term "this court" to refer to Judge Marsh's court, and the judge's order to bar appellants Herman and Mermelstein from applying for pro hac vice admission in cases before him, and requiring members of their firm who do so to submit copies of the court order to bring to the court's attention their membership in appellants' law firm.

. “The usual method for resolving factual issues under § 1927 is by affidavit, North American Foreign Trading Corp. v. Zale Corp., 83 F.R.D. 293, 298 (S.D.N.Y.1979). That would appear to be a perfectly adequate mechanism in many instances for providing counsel with an opportunity to be heard where the judge has effectively witnessed the offenses." Gregory P. Joseph, Sanctions: The Federal Law of Litigation Abuse, p. 416-417 (2d ed.1994).

. The principal fact issue in § 1927 cases— the state of mind of the offender — may perhaps best be described as a mixed question of law and fact. It is one which "is informed by the district court’s intimate familiarity with the case, parties, and counsel, a familiarity [that an appellate court] cannot have. Such a determination deserves substantial deference from a reviewing court.” O’Connell v. Champion Int’l Corp., 812 F.2d 393 , 395 (8th Cir.1987).

. We do not find Judge Marsh's sanctions to have been based on Mermelstein's client’s non-compliance, but on Mermelstein’s misrepresentations to the court, made in an effort *1120 to justify his client's continuing violation of the court order. Moreover, Mermelstein was no neophyte; he had been practicing law since 1986. Judge Marsh questioned Mer-melstein concerning his eleven years of practice and was able to consider his legal experience when evaluating Mermelstein’s conduct before the court.

. As noted above, the original July 1997 order barred Herman, Mermelstein, and members of their law firm from appearing before the court pro hac vice. The modified June 1998 order merely barred Herman and Mer-melstein from appearing before Judge Marsh and required other members of the firm who applied for such admission to attach a copy of the sanction order.