15. A computer-implemented method of processing mail documents returned to a financial institution, the method comprising: receiving, by a computer system, a plurality of returned mail documents in electronic form, wherein the computer system comprises at least one processor and operatively associated memory; extracting, by the computer system, metadata from the returned mail documents; correlating, by the computer system, a returned mail document selected from the plurality of returned mail documents to a first client account considering the extracted metadata; if the returned mail document comprises a forwarding address: generating, by the computer system, instructions for re-sending the returned mail document to the forwarding address; and updating, by the computer system a status of the first client account to reflect the forwarding address; identifying a branch office of the financial institution associated with the first client account; transmitting, by the computer system, information about the returned mail document to the branch office; determining, by the computer system, whether the returned mail document was sent prior to the last address change associated with the first client account; and if the returned mail document was sent prior to the last address change associated with the first client account, generating instructions for resending the returned mail document to a new address associated with the first client account; determining, by the computer system, whether any other mail documents correlated to the first client account have been returned; updating, by the computer system, the number of returned mail documents correlated to the first client account considering the mail document; conditioned upon the number of returned mail documents correlated to the first client account being greater than or equal to a predetermined number, marking the first client account undeliverable; conditioned upon the number of returned mail documents correlated to the first client account having been greater than or equal to a second predetermined number for greater than a predetermined time period, marking the first client account undeliverable, wherein the second predetermined number is less than the first predetermined number.
15. A computer-implemented method of processing mail documents returned to a financial institution, the method comprising: receiving, by a computer system, a plurality of returned mail documents in electronic form, wherein the computer system comprises at least one processor and operatively associated memory; extracting, by the computer system, metadata from the returned mail documents; correlating, by the computer system, a returned mail document selected from the plurality of returned mail documents to a first client account considering the extracted metadata; if the returned mail document comprises a forwarding address: generating, by the computer system, instructions for re-sending the returned mail document to the forwarding address; and updating, by the computer system a status of the first client account to reflect the forwarding address; identifying a branch office of the financial institution associated with the first client account; transmitting, by the computer system, information about the returned mail document to the branch office; determining, by the computer system, whether the returned mail document was sent prior to the last address change associated with the first client account; and if the returned mail document was sent prior to the last address change associated with the first client account, generating instructions for resending the returned mail document to a new address associated with the first client account; determining, by the computer system, whether any other mail documents correlated to the first client account have been returned; updating, by the computer system, the number of returned mail documents correlated to the first client account considering the mail document; conditioned upon the number of returned mail documents correlated to the first client account being greater than or equal to a predetermined number, marking the first client account undeliverable; conditioned upon the number of returned mail documents correlated to the first client account having been greater than or equal to a second predetermined number for greater than a predetermined time period, marking the first client account undeliverable, wherein the second predetermined number is less than the first predetermined number. 18. The method of claim 15 , further comprising: receiving the plurality of mail documents in paper form; scanning the plurality of mail documents to electronic form; and storing the paper form documents for a predetermined amount of time.