The SSS UMID transaction number is a unique identifier assigned to each transaction related to the Unified Multi-Purpose ID (UMID) card issued by the Social Security System (SSS) in the Philippines. The UMID card serves as a single identification card for all members of the SSS and is also used to withdraw SSS benefits and loans from ATMs. The transaction number is used to track the status of UMID card applications and other transactions related to the card, such as ATM upgrades. The transaction number can be checked online through the SSS website or by contacting the SSS directly.