You can cash a check made out to two payees if you are one of the payees and the other has signed the check. You can also cash it if both payees have signed it over to you.

No, a money order cannot be made out with two payees. There needs to be one individual payee on each money order.

If you mean a payee, it depends on how the names are conjoined: "and" requires both payees to endorse the check; "or" permits one or the other to endorse the check. In both situations, both payees are entitled to the cash value of the check.

the Social Security card contains no biometric identifiers of any sort

Yes, a bank can reverse a cashier's check deposit if only one of the payees has an account, depending on their policies and procedures. The bank may require both payees to endorse the check before depositing it to prevent any potential issues with the transaction. It's important to check with the bank for specific guidelines in such situations.