When there is insufficient evidence to justify a continuance, we will stop benefit
                  payments for the first month in which the FO, DDS, or PSC discovers that the beneficiary
                  or recipient's whereabouts are unknown, but no earlier than the month in which the
                  continuing disability issue arose.
               
               REMINDER: The FO must follow the steps in DI 13015.013 before ceasing (Title II) or suspending (Title XVI) payments due to WU.
               
               a. Title II cessation
               For Title II, WU is a nonmedical cessation of benefits. Therefore, statutory benefit
                  continuation (SBC) does not apply to Title II WU cessations. Refer to DI 12027.015 for more information on SBC requirements.
               
               EXAMPLE: On 1/27/2021, the FO sends a letter requesting that the Title II beneficiary call
                  by 2/11/2021. The Post Office returns the letter on 2/10/2021 indicating that the
                  addressee is unknown at that address. After following all development steps in DI 13015.013, the FO cannot locate the beneficiary. The FO determines that the beneficiary's disability
                  ceased beginning 2/2021. After two grace months, benefits terminate as of 05/2021.
               
               b. Title XVI suspension
               For Title XVI, WU is a technical suspension of benefits (payment status "S06"). This
                  is different from Title II in which we cease benefits.
               
               
                  
                     NOTE: Goldberg-Kelly (GK) procedures do not apply to Title XVI WU cases. An S06 suspension
                        is an exception to systems GK due process procedures. See SI 02301.240 Whereabouts Unknown (S06).