Opinion by Judge ALARCÓN; Dissent by Judge KLEINFELD.

Ricardo Ahumada-Aguilar appeals from his conviction pursuant to 8 U.S.C. § 1326 (a) and (b) of two counts of reentering the United States, without the consent of the Attorney General, after being deported as an alien following his conviction in a state court of the crimes of residential burglary and possession of cocaine. We reverse the judgment of conviction because we conclude that the Government failed to demonstrate that the underlying deportation proceedings were conducted in conformity with due process.

I

Ahumada-Aguilar was indicted on June 7, 1995. On August 24, 1995, he filed separate motions to dismiss the indictment. In one motion, he requested dismissal on the basis that he is not subject to prosecution for a violation of § 1326(a) and (b)(1) because he is not an alien. Ahuma-da-Aguilar alleged that at the time of his birth in Mexico to a Mexican citizen mother, his father was a United States citizen. He argued that he met all of the valid constitutional requirements for citizenship set forth in 8 U.S.C. § 1401 (g) for a person born out of wedlock whose father is a United States citizen. He also asserted that the requirements of 8 U.S.C. § 1409 (a)(3) and (a)(4) that are applicable solely to children born out of wedlock to United States citizen fathers are unconstitutional as a denial of equal protection of the law.

In the second motion, Ahumada-Aguilar argued that the indictment should be dismissed because he was deprived of his right to due process at his November 18, 1991 deportation proceedings. He asserted the following procedural errors: (1) he was not notified he had a right to contact and communicate with the Mexican Embassy; (2) he was not notified of the exact nature of the deportation charges against him until the day of the order to show cause hearing; (3) he was not adequately informed of his right to counsel and the availability of legal services; (4) he did not competently waive that right; (5) he was not adequately informed of the opportunity to seek appellate review of the deportation order; (6) nor did he knowingly and intelligently waive that right.

The district court denied both motions. After a bench trial on stipulated facts, the district court found Ahumada-Aguilar *946 guilty of two counts of illegally reentering the United States.

In response to Ahumada-Aguilar’s appeal from the judgment of conviction, a panel of this court consisting of Judges Alarcon, Norris, and Kleinfeld affirmed the district court’s judgment of conviction in an unpublished disposition. Judge Norris dissented. He concluded that Ahuma-da-Aguilar was denied due process at his deportation proceedings because the immigration judge (“IJ”) did not obtain a knowing, voluntary, and intelligent waiver of his right to counsel, and did not elicit a valid waiver of his right to appeal.

Consideration of Ahumada-Aguilar’s petition for rehearing with suggestion for rehearing en banc was withdrawn pending simultaneous briefing regarding the impact on his equal protection contention of the Supreme Court’s decision in Miller v. Albright, 523 U.S. 420 , 118 S.Ct. 1428 , 140 L.Ed.2d 575 (1998), wherein the petitioner raised a similar constitutional attack on § 1409(a)(3) and (a)(4). Because of Judge Norris’s retirement from this court, Judge Schroeder was drawn to take his place on the panel. On October 8, 1998, the reconstituted panel withdrew the memorandum disposition and the dissent. In our second opinion in this matter, we reversed the judgment of conviction. United States v. Ahumada-Aguilar, 189 F.3d 1121 (9th Cir.1999). The majority held that § 1409(a)(3) and (a)(4) deprives a United States citizen of equal protection of the law. Id. at 1125-27. Judge Kleinfeld dissented. Because we resolved the equal protection claims in Ahumada-Aguilar’s favor, we did not consider his contention that the underlying deportation order was invalid because of the deprivation of his procedural rights.

On June 18, 2001, the Supreme Court vacated our judgment and remanded this matter for further consideration in light of Nguyen v. INS, 533 U.S. 53 , 121 S.Ct. 2053 , 150 L.Ed.2d 115 (2001). The petitioner in Nguyen , like Ahumada-Aguilar, was born out of wedlock to a foreign citizen mother and a United States citizen father. Id. at 57 , 121 S.Ct. 2053 . Nguyen argued that § 1409(a) “violates equal protection by providing different rules for attainment of citizenship by children born abroad and out of wedlock depending upon whether the one parent with American citizenship is the mother or the father.” Id. at 58, 121 S.Ct. 2053 . The Court held in Nguyen that “ § 1409(a) is consistent with the constitutional guarantee of equal protection.” Id. at 58-59, 121 S.Ct. 2053 . Since precisely the same challenge to § 1409(a) has been presented by Ahuma-da-Aguilar in asserting that he is a United States citizen, we must reject his equal protection challenge to the same statute.

II

Because the Supreme Court has instructed us that § 1409(a) is constitutional, we must now turn to the remaining issues in Ahumada-Aguilar’s challenge to the judgment of conviction. AhumadaAguilar contends that we must reverse his conviction because the IJ deprived him of his right to due process at the deportation proceedings by failing to require him to state individually whether he desired to be represented by counsel at no expense to the Government. He also argues that his waiver of his right to appeal was invalid because it was not knowing and intelligent.

*947 United States v. Mendoza-Lopez, 481 U.S. 828, 839 , 107 S.Ct. 2148 , 95 L.Ed.2d 772 (1987).

In United States v. Proa-Tovar, 975 F.2d 592 (9th Cir.1992), we held that “[a] defendant who seeks to exclude evidence of a deportation order in a prosecution under 8 U.S.C. § 1326 must do more than demonstrate deprivation of the right to a direct appeal from that order. The defendant also bears the burden of proving prejudice.” Id. at 595 . A collateral attack on an underlying deportation hearing presents a mixed question of law and fact which we review de novo. Id. at 594 .

A.

Congress expressly provided that an alien has the right to representation by counsel at no expense to the Government in 8 U.S.C. § 1362 . “Failure to accord an alien this right may, in the light of the entire administrative record, be an abuse of discretion, requiring remand. If the prejudice to the alien is sufficiently great, there may indeed be a denial of due process itself.” Castro-O’Ryan v. INS, 847 F.2d 1307, 1312-13 (9th Cir.1988). At the time of Ahumada-Aguilar’s deportation proceedings, § 1362 read as follows:

8 U.S.C. § 1362 (1991).

The Attorney General promulgated 8 C.F.R. § 242.16 (a) to implement § 1362. At the time of Ahumada-Aguilar’s deportation proceedings, § 242.16(a) provided in pertinent part:

8 C.F.R. § 242.16 (a) (1991) (removed and reserved 62 Fed.Reg. 10312, 10382 (Mar. 7, 1997)).

Before the district court, the prosecutor in Ahumada-Aguilar’s criminal reentry proceedings argued that “under present Ninth Circuit case law, there was a procedural defect in the deportation hearing resulting from the failure of the IJ to individually address the defendant regarding the right to counsel.” The district court agreed. The district court stated: “No individual colloquy took place. Clearly there has been — was a violation of the regulation and procedure.” Notwithstanding this finding, the district court ruled that Ahumada-Aguilar “implicitly waived his rights even though he remained silent and didn’t expressly say he did or did not want an attorney.” The record of the deportation proceedings does not support this finding. Furthermore, acceptance of an implicit waiver of the right to counsel is unequivocally inconsistent with the duty of an IJ to “require the respondent to state then and there whether he requires representation.” 8 C.F.R. § 242.16 (a) (1991).

The IJ conducted a group deportation proceeding on November 18, 1991, including Ahumada-Aguilar and at least three other respondents. The portion of the transcript that sets forth the IJ’s advice regarding the right to counsel reads as follows.

This transcript reflects that an unidentified respondent stated: “No, I don’t want a lawyer.” The record is silent regarding whether Ahumada-Aguilar and the other respondents who remained silent knowingly and voluntarily waived their right to counsel. Instead of inquiring of each respondent whether to state that he wished to be represented by counsel, the IJ told the group that if they wished “to proceed right now and speak for yourselves please stand up.” When one of the respondents asked what the IJ meant by “speak,” the IJ responded that it meant that the re *949 spondent was “ready to proceed, ready to go forward with your case right now.” The court did not explain that by standing up, the court would conclude that the respondent was knowingly and voluntarily waiving the right to be represented by counsel.

We have no way of determining from the transcript of the deportation proceedings which of the respondents stood up and raised their right hands. The record shows that when the IJ administered the oath, the interpreter advised the court that each of the aliens had stated that he would testify truthfully.

We can infer three possible reasons from this murky record why one or more of the aliens stood up and raised his right hand: (1) He wanted the deportation hearing to proceed without any further delay; (2) He wanted to waive his right to counsel; or (3) He stood up and raised his right hand as requested so that the court could administer the oath. None of these possibilities demonstrates that the IJ complied with the requirement of § 242.16(a) that the respondent be asked to state whether he wished to be represented by counsel.

We have previously held that problems can result from the practice of conducting group deportation proceedings in determining whether an IJ elicited a waiver of the right to appeal. In United States v. Lopez-Vasquez, 1 F.3d 751 (9th Cir.1993), we held that “mass silent waiver impermis-sibly ‘presume[s] acquiescence’ in the loss of the right to appeal and fails to overcome the ‘presumption against waiver.’ ” Id. at 755 . In Lopez-Vasquez , as here, the IJ did not ask each member of the group whether he wished to waive his rights. Id. at 752 . Instead, the IJ asked anyone who wanted to appeal to stand up so that he could discuss it with them further. Id. at 753 .

We held in Lopez-Vasquez that this “mass silent waiver” procedure failed to elicit a “considered and intelligent” waiver of the right to appeal and thus violated 'the due process rights of the petitioner. Id. at 754-55 . We explained that “[m]ass silent waiver creates a risk that individual detainees will feel coerced by the silence of their fellows” and that asking individuals who wish to appeal to stand for further questioning “tended to stigmatize detainees who wished to appeal and to convey a message that appeal was disfavored and contingent upon further discussion with the immigration judge.” Id. at 754 .

More recently, in United States v. Zarate-Martinez, 133 F.3d 1194 (9th Cir.1998), we found a due process violation in the IJ’s failure to elicit a valid waiver of the right to appeal in a group deportation hearing. The proceedings in Zarate-Martinez are almost identical to those used to secure Ahumada-Aguilar’s waiver of his right to counsel. In Zarate-Martinez , the IJ explained the right of appeal to a group of twenty-two detainees. Id. at 1197 . The IJ then asked: “You all understand that you will have the right to appeal.” Id. The interpreter responded: “Everyone answers yes.” Id. Then the IJ stated, “If any of you wants to fight its (sic) case to try to stay in the United States, please raise your hand.” Id. at 1198 . Unlike Ahumada-Aguilar’s hearing, the IJ later addressed Zarate-Martinez directly, asking “Do you understand your rights?” Id. The petitioner responded “Yes” and when asked if there was anything else he would like to say, he replied “No.” Id. We held in Zarate-Martinez that this response did not constitute a voluntary and intelligent waiver of the right to appeal. Id.

We cannot discern a principled reason to hold that group silence does not demonstrate a knowing and intelligent waiver of the right to appeal, but is sufficient to *950 satisfy the requirement of § 242.16(a) that the IJ require each respondent to “state then and there whether he desires representation/’ We are persuaded that the IJ deprived Ahumada-Aguilar of his statutory right to be represented by counsel at his deportation hearing.

B.

Ahumada-Aguilar also argues that the deportation hearing was procedurally flawed because the waiver of his right to appeal was unknowing and involuntary. During the deportation hearing AhumadaAguilar repeatedly stated his desire for a “second chance” and expressed confusion over the consequences of a deportation. Ahumada-Aguilar asked the IJ whether he could return to the United States and regain his lawful permanent residence if he were deported. The IJ replied: “Well, I don’t want to speak for the future, you can ask special permission to come back into the United States but I can’t tell you if you will or will not get it, that’ll be something you’ll have to deal with later.” (emphasis added).

The IJ’s advice to Ahumada-Aguilar that he could ask special permission to return to the United States was erroneous. Aliens who have been convicted of a violation of the law relating to a controlled substance are ineligible to receive a visa to enter the United States. 8 U.S.C. § 1182 (a)(2)(A)(i)(II) (1991). 2 After hearing the IJ’s erroneous interpretation of the consequences that will result from the deportation of a person convicted of possession of cocaine, Ahumada-Aguilar waived his right to appeal the deportation order. We agree with Ahumada-Aguilar that a waiver of the right to appeal based on an IJ’s erroneous interpretation of the impact on a respondent’s right of lawful reentry into the United States is not knowing and intelligent.

Ill

We must now consider whether these due process deprivations were prejudicial. Procedural flaws alone do not invalidate a deportation hearing. Proa-Tovar, 975 F.2d at 595 . It remains unsettled in this circuit whether a showing of prejudice must be made where the right to counsel has effectively been denied a respondent in a deportation hearing. See Baires v. INS, 856 F.2d 89 , 91 n. 3 (9th Cir.1988); Colindres-Aguilar v. INS, 819 F.2d 259, 262 (9th Cir.1987) (citing Rios-Berrios v. INS, 776 F.2d 859, 863 (9th Cir.1985)). Once again, we leave that issue for another day because it is clear from the record that the denial of counsel was prejudicial to Ahumada-Aguilar. Despite conceding that the IJ violated § 242.16(a) by failing to require AhumadaAguilar to state whether he wished to be represented by counsel in the deportation hearing, the prosecutor in Ahumada-Aguilar’s criminal reentry proceedings argued that “the defendant was not prejudiced by the failure of the IJ to follow the precise formality of this procedural requirement as there were no factors available at the time of the hearing that could have prevented the defendant’s deportation.” We disagree.

“With only a small degree of hyperbole, the immigration laws have been termed ‘second only to the Internal Revenue Code in complexity.’ A lawyer is often the only *951 person who could thread the labyrinth.” Castro-O’Ryan, 847 F.2d at 1312 (internal citation omitted). A competent attorney would have informed Ahumada-Aguilar that he should not concede deportability because he was arguably a United States citizen. The third-party equal protection challenge Ahumada-Aguilar raised in the criminal reentry proceedings presented an as yet unresolved constitutional question. The fact that the issue was subsequently clearly decided by the Supreme Court against Ahumada-Aguilar’s position, in Nguyen, supra, in no way diminishes the ripeness of the issue at the time of his deportation hearing.

At the time of Ahumada-Aguilar’s deportation proceedings, an alien was eligible for a discretionary waiver of deportation after legally residing in the country for seven consecutive years. 8 U.S.C. § 1182 (c) (1991). 3 An alien continued to accrue legal residency time for the purpose of this discretionary waiver while pursuing an appeal of his deportation order. See Foroughi v. INS, 60 F.3d 570, 572 (9th Cir.1995) (holding that, pursuant to a Board of Immigration Appeals decision, an alien’s lawful residency in the United States continued to accrue until the disposition of his petition for judicial review contesting the merits of his deportation). The IJ incorrectly concluded that Ahumada-Aguilar had “only had his green card for five years.” In fact, at the time of the deportation hearing, Ahumada-Aguilar had held his green card for approximately six years and two months, leaving him just ten months shy of being eligible for a discretionary waiver of deportation. While it may not be the duty of the IJ to inform a respondent that he may become eligible for a waiver of deportation during the substantial time required to pursue an appeal from the deportation order, cf. United States v. Arrieta, 224 F.3d 1076, 1079 (9th Cir.2000) (holding that pro se alien’s waiver of the right to appeal his deportation order was invalid where the IJ failed to inform him about his eligibility for relief from deportation), a competent attorney would have recognized the IJ’s failure to calculate accurately the length of Ahumada-Aguilar’s total residence in the United States. A competent attorney would have urged him to press an appeal in order to accrue the final ten months necessary for him to qualify for a discretionary waiver of deportation. In this context, an appellant need not prove that he would have been granted a discretionary waiver, but only that he had plausible grounds for relief. See, e.g., United States v. Jimenez-Marmolejo, 104 F.3d 1083, 1086 (9th Cir.1996) (holding that an alien who had lived in the United States since age three, who was borderline retarded, and who’s family lived in the United States had shown plausible grounds for discretionary relief from deportation). The district court found that had Ahumada-Agui-lar accumulated the seven years necessary to apply for a discretionary waiver during an appeal of the deportation proceedings, he “would have had a reasonable chance, *952 in fact a very good chance to get the relief he needed to stay in the United States.” We agree.

Lastly, a competent attorney would have advised Ahumada-Aguilar that if he was deported as a felon, he could not be granted special permission to return to the United States to be reunited with his family, contrary to the statement made by the IJ. Advice from a competent attorney would have prevented Ahumada-Aguilar from making an unknowing and involuntary waiver of his right to appeal based on misinformation.

CONCLUSION

The IJ’s failure to address Ahumada-Aguilar individually in order to obtain an express statement that he wished to waive his right to counsel knowingly and intelligently, and the IJ’s erroneous statement of law regarding Ahumada-Aguilar’s waiver of his right to appeal violated his right of due process. With the assistance of counsel, Ahumada-Aguilar would have had the opportunity to present evidence that he was entitled to relief from deportation after he had exhausted an appeal from the deportation order. Thus, he was prejudiced by these due process violations. We hold that the 1991 deportation order may not be used to support his conviction for illegal reentry. The judgment of conviction is REVERSED.

. The transcription of the deportation hearing identified Judge Kenneth Josephsen as "JJ", the interpreter, Cynthia Adams, as "CA”, and unknown respondents as "UNK."

. 8 U.S.C. § 1182 (a)(2)(A)(i)(II) (1991) states: Except as provided in clause (ii), any alien convicted of, or who admits having committed, or who admits committing acts which constitute the essential elements of a violation of (or a conspiracy to violate) any law or regulation of a State, the United States, or a foreign country relating to a controlled substance (as defined in section 802 of Title 21) is excludable.

. 8 U.S.C. § 1182 (c) (1991) provides: