The CP508C is titled "Notice of Certification of Your Seriously Delinquent Federal Tax Debt to the State Department." Read that title twice. It is past tense. By the time you are holding the notice, the IRS has already decided your account met the test and has already sent your name to the State Department.

That is the bad news. The good news is that the notice tells you exactly which tax periods and balances drove the certification, and that information is what you need to unwind it.

What the notice actually is

IRC 7345(d) requires the IRS to notify you at the same time it certifies you, and to explain in simple terms your right to go to court. The CP508C is that notice. According to IRM 5.19.25.7 and 5.19.25.8:

  • It is generated by computer, not by a revenue officer who chose you.
  • It lists each certified tax period and its balance.
  • It may list more than one taxpayer identification number if business and individual liabilities were combined.
  • It is mailed by regular mail to your last known address.
  • Certifications are sent to the State Department in weekly batches.

One detail from the IRS passport page matters for anyone with a representative: the IRS does not send a copy of the CP508C to your power of attorney. If you have a tax professional, forward it to them the day it arrives.

You should normally receive only one CP508C. If you incur a new balance that also qualifies, the IRS recalculates and issues a new CP508C listing all certified periods. That second notice can show different balances for the old periods because of payments or adjustments in between.

What the notice does not mean

It does not mean your passport has been revoked. The IRS has no authority to issue, deny or revoke passports. IRM 5.19.25.9 says so directly: the State Department is responsible for passports.

It does not mean you cannot travel today on a valid passport you already hold. Whether the State Department acts against an existing passport is a separate question, covered in how State Department denial and revocation work. The practical risk is highest when you apply for a new passport or a renewal.

It does not mean the IRS is about to seize your house. Certification is a separate enforcement tool. It often travels with other collection activity, but it is not itself a levy.

It does not give you an administrative appeal. IRM 5.19.25.13 is blunt: there is no administrative appeal, claim process or hearing with the IRS to challenge a certification. Your remedies are to fix the account so the IRS must reverse the certification, or to sue if the certification was wrong.

Step one: check whether the certification was correct

Pull your IRS account transcripts for every period listed on the notice. Then test the certification against the statute:

  • Is the total assessed balance more than the threshold that applied when you were certified? For 2026 that is $66,000. Accrued, unassessed interest does not count.
  • Was a lien notice filed with your CDP rights exhausted or lapsed, or was a levy made, for the certified periods?
  • Were you paying on time under an approved installment agreement or accepted offer when you were certified?
  • Did you have a pending installment agreement request, pending offer, timely CDP hearing on a levy, or innocent spouse claim covering those periods?
  • Were you in bankruptcy, in hardship status, a documented identity theft victim, in a combat zone, or in a federally declared disaster area?

If any answer shows the certification should not have happened, it is erroneous. IRC 7345(c)(2)(D) requires reversal as soon as practicable after that finding. Start with the IRS at the number on the notice. The IRM lists the centralized passport lines as 855-519-4965, and 267-941-1004 for international callers.

Step two: if it was correct, choose the exit

Most certifications are correct when made. The question becomes which recognized posture you can move the account into. The options, roughly from fastest to slowest:

  • Full payment of every certified period. Paying part of it, even below the threshold, will not reverse the certification.
  • An installment agreement under IRC 6159. The statute requires the IRS to notify the State Department within 30 days after the agreement is entered into.
  • Currently not collectible status due to hardship, if your finances support it.
  • An offer in compromise. A pending offer is a discretionary exclusion, and an accepted offer being paid on time is a statutory one.
  • An innocent spouse claim, if the debt is properly your spouse's or former spouse's.
  • An adjustment that reduces the original assessment below the threshold, such as penalty abatement, audit reconsideration, or an original return replacing a substitute for return.

The exit should be chosen on the merits of your whole case. A payment plan you cannot afford will default, and a defaulted agreement no longer protects you. If you are weighing these options, this overview of installment agreements is a good starting point.

Step three: if you have a trip coming, ask for an expedite

Normal reversal runs on a 30-day clock. The IRS can shorten that when there is a real travel need. Under IRM 5.19.25.10.1, the IRS generally completes expedited decertification in 9 to 16 days, but only if three things are true for a taxpayer living in the United States: the account already qualifies for reversal, travel is scheduled within 45 days with proof, and you have a pending passport application with a State Department denial letter dated within the past 90 days.

The order of operations matters. You fix the account first, then ask for the expedite. The details are in reversing a passport certification.

Step four: watch the mail for Letter 6152

If you hold a valid passport and do nothing, the IRS may go a step further and ask the State Department to revoke it. Under IRM 5.19.25.11.2, the IRS first sends Letter 6152, Notice of Intent to Request U.S. Department of State Revoke Your Passport, which gives you 30 days to resolve the debt (90 days if mailed abroad). A revenue officer has to verify that you have a passport and get management approval before that letter goes out.

A Letter 6152 is a much louder alarm than a CP508C. If you receive one, the 30 days are the time to act, not the time to research.

Mistakes that make a CP508C worse

A few responses come up again and again, and none of them help. Sending a partial payment and assuming the problem is solved is the most common. As explained in what counts as seriously delinquent tax debt, paying below the threshold does not reverse a certification. Calling the State Department first is another. The State Department cannot fix an IRS certification; it can only act on what the IRS reports.

The third mistake is setting up an agreement you cannot keep. A defaulted installment agreement stops protecting you, and the IRS manual lists a broken promise after decertification as a factor supporting a request to revoke a passport. The fourth is waiting until a trip is booked. The expedite helps people who already fixed the account, and fixing the account is the slow part.

When the reversal comes

When the last certified period is cleared, the IRS sends Notice CP508R, the reversal of certification, and informs the State Department in its weekly transmission. Keep the CP508R with your passport paperwork. If the State Department has an application on hold, its own process still has to run, so a reversal is a reason to follow up with the passport agency, not a guarantee that a book arrives in the mail the next day.

The CP508C is unpleasant, but it is also specific. It names the periods, it names the balances, and the statute names the exits. People who treat it as a to-do list get their passports. People who file it in a drawer find out at the airport.