The short answer. No. No travel document guarantees admission. A reentry permit, an unexpired Permanent Resident Card presented after an absence of less than one year, and a returning resident (SB-1) immigrant visa are each evidence offered at inspection rather than an entitlement to enter. The statute says so directly: a permit “shall have no effect under the immigration laws except to show that the alien to whom it was issued is returning from a temporary visit abroad,” INA 223(e), 8 USC 1203(e). USCIS makes the same point in plainer terms, cautioning that admission is not guaranteed even when the appropriate document is held.
Inspection still happens. Everyone applying for admission or readmission is inspected by immigration officers, INA 235(a)(3), 8 USC 1225(a)(3). A permit does not shorten that inspection or substitute for it.
What a permit does secure. Two things, and nothing beyond them. It serves as the entry document in place of a returning resident visa (which is necessary for trips of one year or more, up to the validity of the reentry permit), and it prevents a finding that status was abandoned “based solely on the duration of an absence or absences while the permit is valid.” That second protection is expressly confined to a holder “who is otherwise admissible.”
Where a problem can still arise. Refusal remains possible along two independent routes. The first is abandonment established on evidence other than length of absence: the location of employment, of a home and of family, the pattern of tax filings, and the purpose stated for the trip all remain in play, because the permit neutralizes duration alone. The second is inadmissibility. An offense identified in INA 212(a)(2), illegal activity after departure, departure while under legal process seeking removal, or an attempt to enter without inspection each makes a returning resident an applicant for admission under INA 101(a)(13)(C), and the grounds in INA 212(a) are then tested.
What an officer at the port of entry may do. Where permanent resident status is verified and has not been terminated, the examining officer may not issue an expedited removal order. The officer instead determines under INA 101(a)(13)(C) whether the traveler is making an application for admission at all; may consider a discretionary waiver of documentary requirements under INA 211(b); may defer inspection to an onward office for later presentation of documents; and, where the traveler appears inadmissible, may initiate removal proceedings under INA 240. Refusal of admission to a permanent resident is therefore a matter for an immigration judge rather than a decision made at the counter.
Status continues until an order is entered. Permanent resident status “terminates upon entry of a final administrative order of exclusion, deportation, or removal.” A resident referred to an immigration judge accordingly remains a permanent resident in the meantime. Relinquishment recorded on Form I-407 is a voluntary act, described by USCIS as the way a resident notifies the agency of a voluntary abandonment of status, and not a determination the inspecting officer makes alone. An applicant for admission may also be permitted to withdraw the application and depart, but only as a matter of discretion, INA 235(a)(4).
Who has to prove what. In a proceeding under INA 240, an applicant for admission bears the burden of establishing that he or she is clearly and beyond doubt entitled to be admitted and is not inadmissible, INA 240(c)(2)(A), 8 USC 1229a(c)(2)(A). A respondent who is not an applicant for admission bears a different and lighter burden, showing by clear and convincing evidence lawful presence pursuant to a prior admission, INA 240(c)(2)(B). Which burden applies turns on the INA 101(a)(13)(C) determination, which is why that threshold question, and not the permit, usually decides the outcome.
The practical upshot. A reentry permit is strong evidence on one issue and no evidence at all on the others. It is worth obtaining before a long absence, and it is worth understanding that it settles the question of duration rather than the question of admission.
Related pages
Reentry Permits introduces the subject and covers eligibility, filing and validity. What is the purpose of a reentry permit? explains what the document does and does not accomplish. Does a reentry permit overcome a ground of inadmissibility? takes up the admissibility side in detail. Can a reentry permit be obtained from outside the U.S.? covers the requirement of filing from within the United States. Questions about a specific set of facts may be directed to Antao & Chuang through the firm’s contact page.