ORDER AMENDING OPINION AND AMENDED OPINION

ORDER

The opinion filed on February 14, 2007 and reported at 476 F.3d 773 is hereby amended as follows: •

With these amendments, the petition for panel rehearing is denied. No further petitions for rehearing may be filed.

OPINION

Petitioner Rigoberto Chaidez entered the United States from Mexico in 1988. We are asked to decide whether Chaidez was properly served with an Order to Show Cause (“OSC”) in 1994. In a prece-dential decision applying the statute in effect in 1994, the Board of Immigration Appeals (“BIA”) held that proper service of an OSC occurred when written notice was sent by certified mail to the alien and the certified mail receipt was signed by the alien, counsel of record, or “a responsible person at [the alien’s] address.” Matter of Grijalva, 211. & N. Dec. 27, 32 (BIA 1995) (en banc). Chaidez’s sworn declaration states that he does not know the person who signed his OSC’s certified mail return receipt and that this person was not authorized to sign on his behalf. In light of this uncontradicted evidence, the government has not satisfied Grijalva’s “responsible person at the alien’s address” requirement.

I

On January 18, 1994, the former Immigration and Naturalization Service (“INS”) issued an OSC for Chaidez. The OSC was sent by certified mail addressed to Chaidez at the San Jose, California address he provided on his asylum and work authorization applications. A return receipt is in the record, signed on a line reserved for “Addressee” rather than that labeled “Agent,” with a name resembling Lilia, Libia, or Lebia Nevarez. On March 8, 1994, the Immigration Court sent a hearing notice by certified mail to Chai-dez’s address, and again a return receipt came back with a signature that appears to be the same person’s.

On May 11, 1994, Chaidez failed to appear for his scheduled hearing and an Immigration Judge (“IJ”) administratively closed the proceedings. In 2000, the INS requested that Chaidez’s case be reopened. The IJ who held the initial hearing regarding this request was inclined to agree with Chaidez’s position that service of his OSC in 1994 was inadequate and that the INS would therefore have to begin proceedings anew. The IJ told the government, with reference to the BIA’s decision in Matter of Huete, 20 I. & N. Dec. 250 (BIA 1991), which was adopted in relevant part by Grijalva: “You’ll have no evidence to the contrary, so I would have ... to find in favor of the respondent. All he needs to do is submit a declaration, I don’t know who this woman is, I never received the notice.” The IJ suggested that Chaidez file a motion to terminate proceedings and indicated that such a motion would be granted if accompanied by a declaration of the kind described.

Chaidez followed the IJ’s directions. He filed a motion to terminate, contending that the OSC was improperly served and that he never received it, citing Grijalva. He also submitted a sworn declaration, stating: “I do not know who the person is who signed on the postal record Form 3811.[ ] It may be Lebia Nevarez. I do not know who Lebia Nevarez is. She does not have authorization to receive service for me. I do not believe she lived at [Chaidez’s relevant address] when I did.” There is no indication in the record whether the address concerned is a single-occupancy home or a multi-dwelling building.

A new IJ was assigned to the case and continued the matter so he could review Grijalva. Chaidez was not questioned at the ensuing hearing about the details of his declaration. In his subsequent decision, the IJ concluded only that “the Order to Show Cause was served on the respondent at his last known address and ... accordingly, the principles of [Grijalva] apply to the respondent’s proceedings. Accordingly, the Court finds that service occurred in January 1994.” The BIA affirmed the results of the IJ’s decision without opinion, pursuant to its streamlining regulation. See 8 C.F.R. § 3.1 (a)(7) (2002).

Chaidez has two minor children who are United States citizens. As a result of the IJ’s decision, Chaidez could not proceed with his application for relief, premised on hardship to his children, due to the stop-time rule, which cut off his continuous physical presence in 1994, six years after he arrived in the United States. See Ram v. INS, 243 F.3d 510, 518 (9th Cir.2001).

II

We review the IJ’s legal determination de novo. See Singh v. INS, 213 F.3d 1050, 1052 (9th Cir.2000),

a. Applicable Statute and Case Law

The Immigration Act of 1990 amended the Immigration and Nationality Act’s notice provisions, with an effective date of June 13, 1992. See Grijalva, 21 I. & N. Dec. at 30-32. For an OSC, which may or may not include the scheduled time and place of proceedings, former § 242B(a)(l), 8 U.S.C. § 1252b(a)(l) (1994), provided that:

If an alien failed to appear for a scheduled deportation hearing, the government was required to establish “by clear, unequivocal, and convincing evidence that the written notice [required under subsection (a)(2)] was so provided.” Id. § 1252b(c)(l).

Addressing these notice provisions, the BIA in Grijalva stated that, as it had previously determined in Huete, proper service of an OSC occurs when written notice is sent by certified mail to the alien and the certified mail receipt is signed by either the alien or “a responsible person at[the alien’s] address.” 211. & N. Dec. at 32. The origin or meaning of the term “responsible person” was not identified in Huete. Grijalva stated with respect to the 1992 change in statutory language that “[i]n the absence of new or contrary language, we find that our holding in Huete continues to be applicable to the accomplishment of service of the Order to Show Cause by certified mail.” Id. Grijalva thereby imported the term “responsible person” from Huete, once again without explaining the origin or meaning of the term.

In Grijalva, the BIA went on to decline to extend the “responsible person” delivery requirement for OSCs, the initial charging documents, to subsequently sent hearing notices, holding with respect to the latter that

Id. at 33-34. Grijalva concluded with respect to hearing notices that a “presumption of effective service may be overcome by the affirmative defense of nondelivery or improper delivery by the Postal Service,” id. at 37, and provided guidance for aliens seeking to rebut this presumption. See id. (“[I]n order to support this affirmative defense, the [alien] must present substantial and probative evidence such as documentary evidence from the Postal Service, third party affidavits, or other similar evidence demonstrating that there was improper delivery or that nondelivery was not due to the [alien’s] failure to provide an address where he could receive mail.”). The BIA noted that the statute’s more stringent requirement for service of an initial charging document, as opposed to subsequent hearing notices, was supported by the fact that after being served properly with an OSC “the alien already had notice that he was in deportation proceedings and would be notified of the calendared hearing,” id. at 34, circumstances that justify placing a lesser burden on the agency to keep the alien informed about the status of already-initiated proceedings.

The government contends, relying on our decision in Arrieta v. INS, 117 F.3d 429 (9th Cir.1997) (per curiam), that “the presumption of effective service ... is relevant to this matter in that certified mail receipts can generally only be signed by a responsible party at the designated address.” Addressing service of hearing notices, Arrieta concluded that “Grijalva is correct that notice [of hearing] by certified mail sent to an alien’s last known address can be sufficient under the Act, even if no one signed for it.” Id. at 431 . In Arrieta , the alien’s hearing notice, sent by certified mail, was returned “with an indication that delivery was ‘attempted.’ ” Id. at 430 . Arrieta contended that “although she had changed her residence, she continued to receive mail at the address she had provided.... In support, Arrieta proffered her letter and a letter from her brother stating that the certified mail notice was never delivered to the ... address.” Id. at 430-31 . We held that “[i]f a responsible person refuses to sign for the certified mail or if the alien has changed address without notice, the presumption of proper delivery in Grijalva is a reasonable construction of the notice requirement of the statute,” id. at 431 , and remanded the matter for the agency to determine whether “Arrieta can establish that her mailing address has remained unchanged, that neither she nor a responsible party working or residing at that address refused service, and that there was nondelivery or improper delivery by the Postal Service,” id. at 432 .

Arrieta , however, dealt with service of a hearing notice, not with service of an OSC. We have not held that a presumption of effective service arises for an OSC, as opposed to a hearing notice, sent by certified mail. The Second Circuit explained the significance of this distinction in Fuentes-Argueta v. INS, 101 F.3d 867 (2d Cir.1996) (per curiam):

Id. at 871 (third alteration in original).

The government nonetheless advocates a presumption of effective service in the OSC context, taking the position that a presumption should be applied that the Postal Service properly discharged its duties and had the addressee or a responsible person at the alien’s address sign for the delivery. We decline to adopt this rule, which would nullify the statute’s and Grijalva’s bifurcated approach to OSCs and hearing notices by applying the same presumption of effective service to certified mail delivery of both documents. As explained by Adeyemo v. Ashcroft, 383 F.3d 558 (7th Cir.2004), in which the Seventh Circuit similarly rejected a presumption of effective service for OSCs:

Id. at 561-62 (alteration in original). We agree with the Second and Seventh Circuits that Grijalva permitted a presumption of effective service only for hearing notices. For OSCs, service was proper only if the INS established that the return receipt was signed by the alien or a responsible person at the alien’s address.

In this case, it is undisputed that Chaidez did not sign for — or receive — the OSC. In the context of the presumption “that postal officers properly discharge their duties,” Salta v. INS, 314 F.3d 1076, 1079 (9th Cir.2002), the issue therefore becomes whether Nevarez was a “responsible person” at Chaidez’s address.

As mentioned above, the term “responsible person” is not defined in the BIA’s case law. Nor has the United States Postal Service’s Domestic Mail Manual (“DMM”) used the term in the context of certified mail delivery or defined it. Generally, the Postal Service’s delivery rules mandate that “[i]f a signed receipt is required, mail will be delivered to the addressee (or competent member of his family), to persons who customarily receive his mail or to one authorized in writing to receive the addressee’s mail.” 39 C.F.R. pt. 3001 subpt. C, app. A § 2023; see also Publication of Domestic Mail Classification Schedule, 50 Fed.Reg. 28,144, 28,164 (June 28, 1985) (codifying this language in the Code of Federal Regulations); DMM Issue 46 § D042.2.1 (July 1, 1993) (describing an “addressee’s agent” as an employee, “a competent member of the addressee’s family, or ... any person authorized to represent the addressee”). If the sender did not specifically restrict delivery recipients, an option that Chaidez’s return receipt makes clear was not selected here, the DMM in effect in January 1994 required delivery “to the addressee or addressee’s authorized representative.” DMM Issue 46 § S912.3.1.

We need not definitively decide who are responsible persons at an alien’s address. Even assuming that Grijalva’s “responsible person[s]” and the Postal Service’s “addressee’s authorized representative^]” are coextensive groups, the record must still demonstrate that Nevarez actually was a responsible person at Chaidez’s address. Instead, as in the proceedings at issue in Adeyemo , “[t]he IJ explicitly relied on the BIA’s decision in Grijalva, not recognizing that the reasoning of that case [concerning when a return receipt does not need to be signed by the addressee or a responsible person at the alien’s address] is limited to Notices of Hearing, and does not apply to Orders to Show Cause.” 383 F.3d at 560 . Thus, while, as in Adeyemo , the IJ here “declarfed] that it did not matter whether the [OSC was] received, so long as there was proof of attempted delivery,” id., Gri-jalva in fact requires the government to show that a “responsible person” at Chai-dez’s address signed the return receipt for his OSC. We therefore turn to evaluating whether the government satisfied this requirement.

b. Evidentiary Requirements

The statute clearly placed the evidentia-ry burden of demonstrating proper OSC service on the government, and by a heightened evidentiary standard. See 8 U.S.C. § 1252b(c)(l) (1994) (when an alien fails to appear at a deportation hearing, the government must establish proper notice “by clear, unequivocal, and convincing evidence”). Because Grijalva was a case in which OSC service was conceded by the alien, see 21 I. & N. Dec. at 35, the BIA provided no guidance regarding evidentia-ry requirements for OSC service. In Huete, “[t]he registered mail return receipt [for the OSC] was returned to the [INS] as unclaimed,” 20 I. & N. Dec. at 251 , so that decision is also unilluminating with regard to proof of the “responsible person at the alien’s address” requirement.

The Seventh Circuit has held that the government can meet its burden of demonstrating OSC notice through receipt by a responsible person at the alien’s address only by means of some evidence indicating that a certified mail return receipt signature in fact belongs to a responsible person at the alien’s address. In Tapia v. Ashcroft, 351 F.3d 795 (7th Cir.2003), the court denied a petition for review in which “Ta-pia conceded before the IJ, and acknowledge[d] in his brief, that the signature could be either his sister’s or his cousin’s, and while the government offered no further proof that it was his sister’s signature, Tapia did not call her to testify that it was not.” Id. at 798 . Adeyemo , by contrast, held that the government failed to carry its burden because “[t]he illegible signature on the return receipt ... is not enough to create a presumption of actual delivery to Adeyemo or a responsible person at his address,” 383 F.3d at 562 , given that Adeyemo “presented evidence that the signature was neither his nor his ex-wife’s and that there was no other responsible person living at his address at the time,” id. at 561 .

This case is similar to Adeyemo , not to Tapia . Here, the government offered no evidence indicating that Nevarez’s signature may be that of a responsible person at Chaidez’s address. The only indication of Nevarez’s status is that she appears to have signed for both the OSC and Chai-dez’s later hearing notice. Although this consistency supports the proposition that Nevarez was not simply a random passerby, it does not establish that she was a responsible person at Chaidez’s address. In his sworn declaration, Chaidez denied knowing Nevarez, adding that he does not believe she resided at his address during the relevant time and that she did not have authorization to receive service for him. Cf Celis-Castellano v. Ashcroft, 298 F.3d 888, 892 (9th Cir.2002) (recognizing that, in a motion to reopen, the agency “must accept the facts in an alien’s affidavit as true unless inherently unbelievable” (citing Maroufi v. INS, 772 F.2d 597 (9th Cir. 1985))).

We conclude that the government has not met its burden, established in former 8 U.S.C. § 1252b(c)(l) and explicated in Gri-jalva, of demonstrating by clear, unequivocal, and convincing evidence that Chaidez or a responsible person at his address signed the certified mail return receipt for his OSC. Accordingly, the IJ erred in determining that Chaidez is ineligible for suspension of deportation on account of insufficient continuous physical presence. We therefore grant the petition for review and remand for further proceedings.

PETITION FOR REVIEW GRANTED; REMANDED.

. On March 1, 2003, the INS ceased to exist and its functions were transferred to the newly created Department of Homeland Security. See Aguilera-Ruiz v. Ashcroft, 348 F.3d 835 , 835 n. * (9th Cir.2003). . Chaidez contends that the IJ's decision to close the proceedings evidences a determination that service was improper, as the statute in effect at the time required an IJ to enter an in absentia deportation order "if the Service establishes by clear, unequivocal, and convincing evidence that the written notice was ... provided and that the alien is deportable.” 8 U.S.C. § 1252b(c)(l) (1994); see also Fuentes-Argueta v. INS, 101 F.3d 867 , 870 (2d Cir.1996) (per curiam) (“In 1990 ... Congress amended the Act to add § 242B, a more stringent provision requiring (rather than merely permitting) the IJ to issue in absentia orders of deportation where the INS establishes deportability by 'clear, unequivocal, and convincing evidence.’ ”); Matter of Gutierrez-Lopez, 21 I. & N. Dec. 479, 480 (BIA 1996) (en banc) ("The administrative closing of a case does not result in a final [deportation] order.” (internal quotation marks and citation omitted)). In light of our disposition of the "responsible person” issue, we need not address Chaidez's contention regarding administrative closure. . This United States Postal Service form is a certified mail "Domestic Return Receipt.” Shortly after Chaidez’s OSC was delivered, the Postal Service proposed amendments to its certified mail receipt requirements to ensure that an individual’s name was printed on the receipt along with his or her signature. See Revisions to Standards Related to Deposit and Delivery of Mail, 59 Fed.Reg. 13,287, 13,287-88 (proposed Mar. 21, 1994) (stating that new rules would require "the person signing for an item to print as well as sign his or her name. This proposed change will apply to ... mail receiving ... certified ... service, and is intended to improve the usefulness of the record of delivery that demonstrates that the mail was delivered and the service rendered. Whether on a Postal Service delivery record or on a receipt returned to the sender, an illegible signature may compromise the value of the service for which the sender paid; the proposed new standard is designed to avoid that potential problem. Because most persons can provide a printed name that is more legible than their handwritten signature, the Postal Service believes the former will be valuable to the sender in those instances when it becomes necessary to identify the person who received an accountable mailpiece.”); see also Revisions to Standards Related to Deposit and Delivery of Mail, 59 Fed.Reg. 32,336, 32,337 (June 23, 1994) (hereinafter "Revisions”) (adopting the requirement that names be printed on return receipts as a final rule and stating that it would be implemented on October 2, 1994). . At the time Chaidez's OSC was mailed, seven years of continuous physical presence were required for suspension of deportation. See 8 U.S.C. § 1254 (a)(1) (1994). The current statute’s provisions for cancellation of removal increased the requisite period to ten years. See 8 U.S.C. § 1229b(l)(A). . We note that 8 C.F.R. § 103 .5a(a)(2)(iv), in 1994 as now, defines "personal service” to include “[m]ailing a copy by certified or registered mail, return receipt requested, addressed to a person at his last known address.” See Matter of Peugnet, 20 I. & N. Dec. 233, 236-37 (BIA 1991) (adopting this definition of personal service for OSCs). “Personal service” as used in former 8 U.S.C. § 1252b(a)(l) appears, however, to mean only service “in person;” service by certified mail was, under the statute, an alternative to “personal service,” not a form of such service. Also, even with respect to service by certified mail, the statute stated that the OSC must be "given ... to the alien or to the alien’s counsel of record,” (emphasis added), not simply sent or mailed. Only by implying the word “addressed” before "to the alien” in § 1252b(a)(l) could the BIA conclude, as it did in Grijalva, that “responsible persons” other than the subject alien may be served with notice on his or her behalf. For present purposes, however, we assume that the regulation and Grijalva were valid applications of the statute, as the OSC service on Chaidez did not comply with the statute even as interpreted in Grijalva. . The statute at the time of Huete provided that: "[T]he alien shall be given notice, reasonable under all the circumstances, of the nature of the charges against him and of the time and place at which the proceedings will be held....” 8 U.S.C. § 1252 (b) (1988). 8 C.F.R. § 242.1 (c) provided at the time that Service of the order to show cause may be accomplished either by personal service or by routine service [regular mail]; however, when routine service is used and the respondent does not appear for [the] hearing or acknowledge in writing that he has received the order to show cause, it shall be reserved by personal service. See Huete, 20 I. & N. Dec. at 252. . The current statute no longer has a requirement that notices to appear, which replaced OSCs, or hearing notices be sent by certified, as opposed to regular, mail. See 8 U.S.C. § 1229 (a)(1), (a)(2)(A); see also Matter of MD-, 23 I. & N. Dec. 540, 546 (BIA 2002) (explaining that "the use of regular mail [is] a convenience to the [INS], not ... a mandate to use regular mail instead of certified mail. As in this case, the Service and the Immigration Courts routinely use certified mail instead of regular mail in many instances, although the degree of the use of certified mail varies from region to region.”). We held in Salta v. INS, 314 F.3d 1076 (9th Cir.2002), a hearing notice case, that Grijalva's "strong presumption” of hearing notice delivery had to be modified accordingly. Id. at 1079 . . In June 1994, the DMM was revised to allow unrestricted certified mail deliveries at an "apartment house ... to any person in a position to whom [sic ] mail for that location is usually delivered.” Revisions, 59 Fed.Reg. at 32,337. The current DMM continues to include this delivery option. See DMM § 508.1.1.7(d) {available at http://pe.usps.com/ text/dmm300/ 508.htm). As this option did not appear for certified mail in the DMM effective at the time Chaidez's OSC was delivered, we do not address whether such persons would be "responsible persons at an alien’s address” and, if so, whether due process would be satisfied by leaving certified mail with them. Cf. Jones v. Flowers, 547 U.S. 220 , 126 S.Ct. 1708 , 164 L.Ed.2d 415 (2006).