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IRS Notice Library

Match the CP or LT code on your letter to understand why the IRS contacted you and what to do next.

All Balance Due Intent to Levy Payment Plans Collection Unfiled Returns Audits & Adjustments Returns & Refunds Business International

Act soon Collection

CP40 / CP140 — Account Assigned to Private Collector

Your overdue account has been transferred to a private collection agency under IRS contract. The letter has an authentication number for verifying the caller.

Urgent Collection

CP508C — Passport Certification Notice

The IRS has certified a seriously delinquent tax debt to the State Department, which can block passport issue or renewal.

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