Debt validation

The address is on the notice they sent you, and the clock is 30 days

This is the rare case where the address is easy and the deadline is the hard part. A debt collector that contacts you about a debt has to send you a validation notice carrying its own name and mailing address. That address is where your dispute goes, and it has to get there inside 30 days of when you received the notice. Miss the window and the protection is gone, which is why the date matters more here than in almost any other letter.

Where the address comes from

Regulation F, 12 CFR § 1006.34, requires a debt collector's validation notice to state the collector's name and mailing address. That is the address to answer. It is on the first letter they sent you about the debt, usually near the top or in the tear-off portion.

Three addresses on that page are commonly mistaken for it:

• The payment address. Often a lockbox in another state. Money goes there. Disputes may not be read there.
• The original creditor's address. The notice names the original creditor so you can recognise the debt. Your dispute goes to the collector, not to them.
• The law firm's address, where a firm is collecting. If the firm sent the notice, the firm is the collector and the firm is where it goes.

Where the notice gives a separate address for disputes or correspondence, use that one. Where it gives only one, use it and keep the notice.

The 30 days, and what the letter actually buys you

Under the Fair Debt Collection Practices Act, 15 U.S.C. § 1692g, if you notify the collector in writing within 30 days of receiving the validation notice that you dispute the debt, or any part of it, the collector must stop collecting until it mails you verification of the debt.

Read the conditions, because each one is a way this fails:

1. In writing. A phone call does not do it, whatever the person on the phone says.
2. Within 30 days of receiving the notice, not of the date printed on it.
3. To the collector. See above.

Once it lands, collection has to stop until they verify. Many accounts simply stop there, because verifying a debt that changed hands three times costs more than the account is worth.

Why the date is the whole argument

Every dispute about a validation letter is a dispute about timing: they say it arrived on day 34, you say you posted it on day 12. Certified Mail settles it, because the Postal Service records when the article was accepted and when it was delivered, and the record does not belong to the collector.

This is also the letter most worth the electronic return receipt. The return receipt records who signed for it, which turns "we never received a dispute" into a named signature on a date.

What to put in it

Do not admit the debt, do not offer a payment, do not give new bank details, and do not send more than the dispute needs. A validation letter is a short letter on purpose.

What you end up holding

• The exact letter that was approved, kept unchanged, with the fingerprint that shows it is the same file.
• The recipient address as it was printed, after the postal check.
• The mailing record: the service that was bought, when the letter was handed over to be printed and mailed, and the reference the printer gave it.
• The sentence you authorized, and the time you authorized it.

You are buying USPS Certified Mail, so the Postal Service keeps its own delivery record. Piloxa asks the printing partner for that history on its own, without anyone pressing anything, and adds each scan to your record as it is reported, naming where it came from. If you chose the return receipt, the signature of whoever accepted the letter is recorded the same way once USPS releases it. Where nothing has come back, the record says “no record yet” rather than guessing. The sample record shows every state, including the incomplete ones.

Certified Mail proves that something was delivered. It does not prove what was inside. Keeping the approved letter beside the mailing record is what closes that gap, and it is the whole reason this exists. See a filled-in record.

Common questions

Where do I mail a debt validation letter?

To the debt collector that contacted you, at the mailing address on the validation notice it sent you. Regulation F requires that notice to carry the collector’s name and mailing address, so the address you need is already in your hands.

Do I send it to the original creditor instead?

No. The validation right under 15 U.S.C. § 1692g runs against the debt collector that contacted you. The original creditor is named on the notice so you can recognise the debt, not so you can write to them.

Can I use the payment address?

Use it only if it is the one address the notice gives. Payment lockboxes are processing centres for cheques; a dispute sent there may never reach anyone who acts on it, and the notice usually names a different address for correspondence.

What if I have missed the 30 days?

You can still dispute in writing, and you should, but the automatic requirement to stop collecting until they verify comes from disputing inside the 30 days. Send it anyway, send it certified, and date it.

Does the letter have to be certified?

Nothing requires it. It is the only practical way to prove the letter arrived inside the window, and that window is the entire value of the letter. The return receipt adds the signature of whoever accepted it.

What does it cost to send?

$13.18 all in for a one-page letter by USPS Certified Mail, or $16.17 all in with the electronic return receipt, which records who signed for it. Printing, envelope and postage are included, with no subscription and no minimum.

Primary sources

• 12 CFR § 1006.34 — Notice for validation of debts (Regulation F)
• 15 U.S.C. § 1692g — Validation of debts
• CFPB — Debt collection
• USPS Postal Explorer: what Certified Mail documents

Legal and postal references last reviewed September 22, 2026. Deadlines run from receipt, and state debt collection rules can add to the federal ones.

Other letters people send certified

• Credit report disputes
• Finding a company’s legal address
• Mortgage notice of error
• Notice of intent to sue
• Refund demands
• Send a certified letter