If you need to know whether a federal tax refund check that was issued to you has been cashed, you can call (800) 829-1954 and request Form 3911 (PDF), Taxpayer Statement Regarding Refund.

If you are inquiring about a check that was issued to someone other than yourself, the IRS is not allowed under the Privacy Act of 1974 to disclose any information.

References:

• Form 3911 (PDF), Taxpayer Statement Regarding Refund

Source: www.irs.gov