For a client who travels — an international investor, a dual resident, a business owner with deals abroad — few IRS tools bite harder than the one that reaches the passport. Since the Fixing America’s Surface Transportation (FAST) Act of 2015 added § 7345 to the Code, the IRS can certify a taxpayer as having a “seriously delinquent tax debt,” and the State Department will then deny, revoke, or limit that person’s passport. It is quiet, automatic, and easy to trip over. Here is precisely what triggers it, what it does, and how it is undone.
What counts as a “seriously delinquent tax debt”
The label is narrower than it sounds, and the dollar figure is only half of it. Under § 7345(b), a seriously delinquent tax debt is an assessed, unpaid, legally enforceable federal tax liability — including penalties and interest — that exceeds an inflation-adjusted threshold, which for 2026 is more than $66,000. But the amount alone is not enough: there must also be a collection predicate — either a Notice of Federal Tax Lien has been filed and the taxpayer’s Collection Due Process rights have been exhausted or have lapsed, or a levy has been issued under § 6331. A large balance with no lien or levy behind it is not certifiable. The debt can be of almost any federal type the individual is liable for — income tax, business tax, even a Trust Fund Recovery Penalty (a $1.6 million TFRP certification was upheld in Spencer v. Commissioner in 2026).
What certification actually does
When the IRS certifies the debt, it transmits that certification to the State Department and, contemporaneously, sends the taxpayer Notice CP508C by regular mail to the last known address. From there the State Department will generally not issue a new passport or renew an existing one, and it may revoke or limit a passport already held — potentially stranding a traveler abroad, where State may issue only a limited document good for a direct return to the United States. The hard reality is one of timing: by the time CP508C arrives, the certification has already been made. The notice is the alarm, not the warning.
What is not certified — the exclusions
Section 7345(b)(2) carves out debts that the IRS will not certify even above the threshold. A debt is excluded while it is being paid under an installment agreement (§ 6159) or an accepted offer in compromise (§ 7122) or a Justice Department settlement; while a Collection Due Process hearing on a levy (under § 6330) is timely requested or pending; or while collection is suspended because the taxpayer has requested innocent-spouse relief. By policy the IRS also will not certify accounts that are currently not collectible for hardship, in bankruptcy, flagged for identity theft, or located in a federally declared disaster area, and it postpones certification for taxpayers in a combat zone.
| Status | Effect on certification |
|---|---|
| Installment agreement (§ 6159), in good standing | Not certified, or reversed |
| Accepted offer in compromise (§ 7122) or DOJ settlement | Not certified, or reversed |
| Timely or pending CDP hearing on a levy (§ 6330) | Not certified |
| Innocent-spouse relief requested (suspends collection) | Not certified while pending |
| Currently not collectible (hardship) | Not certified (IRS policy) |
| Bankruptcy, identity theft, disaster zone, combat zone | Not certified / postponed (IRS policy) |
| Paid in full, or adjusted below the threshold | Reversed — CP508R |
| Liability becomes unenforceable (CSED expires) | Reversed — CP508R |
| Tax Court or district court order (§ 7345(e)) | Reversed — CP508R |
Reversing a certification
The mirror image of CP508C is CP508R, the reversal notice. The IRS reverses a certification when the debt is fully paid; when it becomes legally unenforceable because the collection statute has expired; when it is adjusted below the threshold; when the certification was erroneous; or when the taxpayer comes within one of the exclusions above by entering an installment agreement, getting an offer accepted, requesting a CDP hearing, or seeking innocent-spouse relief. On reversal, the IRS is required to notify the State Department within 30 days. For travelers under time pressure, the Service maintains an expedited decertification process where imminent travel can be documented.
Going to court — § 7345(e)
If the IRS certifies in error or fails to reverse when it should, the taxpayer has a judicial remedy. Section 7345(e) authorizes a civil action in the United States Tax Court or a federal district court to determine whether the certification was erroneous or whether the Service has failed to reverse it, and the court can order the certification reversed. The Tax Court has held that it reviews these cases de novo and will consider new evidence on whether the debt is legally enforceable (Garcia v. Commissioner, 164 T.C. No. 8 (2025)). What the court does not do is redetermine the merits of a properly assessed tax through this route — the question is the propriety of the certification.
The practical takeaway
The cleanest outcome is to resolve the balance before it is ever certified — while the IRS notices are still warnings rather than the CP508C. Once certification happens, the fastest legitimate routes back are an installment agreement, an accepted offer, a timely CDP request, or paying the balance below the threshold — each of which triggers reversal — followed by tracking the account until CP508R is confirmed. For anyone whose work or family depends on travel, a growing IRS balance is not just a financial problem; it is a deadline.