Abstract: Apparatus and methods for providing electronic reassociation of data transmissions of checks and backup information. A method according to the invention may include scanning each check received by a lockbox service and scanning backup information related to correspondence included with each check. Thereafter, the method may include electronically associating each check with the backup information. The method may include generating a data transmission for each check and the associated backup information. Finally, the method may include storing the data transmission for each check and the associated backup information at a periodic interval. Such an interval may be determined, at least in part, by the deposit cut-off time of a financial institution.