Do Sweepstakes Ask For Social Security Number? Generally, legitimate sweepstakes do not require participants to provide their Social Security Number (SSN) to enter. If a sweepstakes asks for your SSN, it could be a red flag for potential scams. Always verify the credibility of the contest before sharing sensitive information. Do Sweepstakes Ask For Social Security Number? If you’re unsure, it’s best to err on the side of caution and avoid providing personal details that aren’t necessary for entry.