Abstract: Methods in which an encrypted transaction validation code is received which positively identifies a first transaction for a first entity, the first entity having a first entity identifier, and the first transaction is electronically verified as being valid by use of the first entity identifier and the validation code. The first entity identifier can be transferred as an account number and the validation code transferred to the money source in a non-account data field. A money source can validate the validation code by duplicating the encryption process used to create the validation code and by then comparing the result to the validation code received. The validation code can be, at least in part, encrypted, and a money source can validate the validation code by duplicating a validation code encryption process and by then comparing the result to the validation code received.