Take the following steps to reissue the check to the IAR agency.
         1. Identify that we issued the payment to an IAR agency. Review the PMTH field of
            the SSR. Payflag 1 of PMTH will reflect either a type 2 (underpayment) or type 4 (A-OTP).
            Payflag 3 will reflect “1” for any IAR payment;
         
         2. Transmit the non-receipt on the Missing Check (UPMC) screen in MSSICS Direct SSR
            Update. For information on using the UPMC screen, see MS
            00303.013; and
         
         NOTE: If you are unsure if the payment went to the correct IAR address, the FO Management
            Support Specialist (MSS) or Operations Supervisor (OS) can the check the Treasury's
            Check Information System to determine the address where the check was mailed.
         
         3. Reissue the check via A-OTP to the IAR agency as soon as possible. Include the
            complete IAR agency address on the One Time Payment Address (UPOA) screen. For information
            on using the UPOA screen, see MS
            00303.023.
         
         Type 2 - Underpayment
         If the missing payment is type 2 (in payflag 1 of PMTH), the underpayment was calculated
            and generated by the system. A type 2 check must be replaced with an A-OTP using the
            same months as the original type 2 check. If a type 2 IAR check is returned and posts
            to the SSR, the system may incorrectly generate another type 2 payment to the claimant.
            The only way to issue a replacement check to the IAR agency is to reissue the funds
            by A-OTP before a returned check is posted to the SSR. If further development is needed
            prior to issuing an A-OTP, prevent automated release of the underpayment by posting
            a U TAC to the SSR via the Underpayment Processing (UOUP) screen in Direct SSR Update.
            Once an A-OTP is issued, you can remove the U TAC. For more information about using
            the UOUP screen, see MS
            00304.018. For information about processing type 2 underpayments, see GN 02406.205.
         
         Type 4 - A-OTP 
         If the missing payment is type 4 (in payflag 1 of PMTH), reissue it as an A-OTP addressed
            to the IAR agency for the same months as the original A-OTP. It is also possible for
            a returned A-OTP to result in a type 2 underpayment being issued to the claimant.
            Post a U TAC to the SSR via “Underpayment Processing” in Direct SSR Update to prevent
            the automated release of the underpayment if there will be a delay in issuing the
            replacement A-OTP.
         
         NOTE: The GRC code in the MPMT segment of the SSR will change from P (IAR check paid for
            initial claim) or G (IAR check paid for post-entitlement) to C (IAR check returned)
            if the IAR check is returned. However, GRC code C is informational only, it will not
            cause the next retroactive payment to be released to the IAR agency. Only GRC codes
            of R (pending IAR case for initial claim) or F (pending IAR case for posteligibility)
            will cause a retroactive check to be sent to the IAR address. For information about
            how the system updates the GR code, see SM 01005.625.