TN 50 (01-24)

GN 02403.163 Processing Programmatic Remittances through the Lockbox


A. Background on Processing Programmatic Remittances through the Lockbox

On January 29, 2021, SSA implemented the use of a lockbox to add efficiencies in the agency’s processing of programmatic remittances. Lockbox banking is a service provided by the U. S. Department of the Treasury, Fiscal Service (Treasury), and their financial agent, US Bank, for the receipt of payment from customers. The customer sends remittances to a designated US Bank P.O. Box, US Bank processes the payments for the agency, and deposits the funds directly into the Federal Reserve Bank.

In early 2021, the Recovery and Collection of Overpayment Process (RECOOP) notices were changed to notify debtors to send their remittances to:

Social Security Administration

P.O. Box 5480

Portland, OR 97228-9816

Beginning December 28, 2022, we redirected all SSI remittance notices intended for MATPSC’s P.O. Box 3430 to the above-referenced U.S. Bank address.

B. Lockbox Remittances Processing


The lockbox service processes single checks with a single coupon and single checks with multiple coupons. These coupons are generated from RECOOP billing notices, commonly referred to as “green mail” The lockbox uses high-speed image scanning equipment to read and verify remittance data from the coupon. The machine-readable remittance coupon uses optical character recognition (OCR) technology. Remittance data is captured and transmitted to the agency daily.

US Bank will image the front and back of processed checks, and image the front and back of any associated remittance documents. It will transmit the images to the Federal Reserve Bank of Cleveland (FRB Cleveland) where the images will be made available to the agency for viewing and download individual checks via Electronic Check Processing (ECP). The ECP is a web-based, client facing application lockbox network or a mobile application. ECP is used by Federal government agencies and their financial agents to view and research transactions.

SSA will also use the Collection Information Repository (CIR), which is a data archive and reporting tool that provides a single solution to view and/or download information for settled transactions processed by the Treasury's portfolio of revenue collection systems.

C. Returns from the Lockbox

Any items that US Bank cannot process will be forwarded daily, via overnight mail, to MATPSC. This includes the following items:

  • Payments without a coupon

  • Unbalanced single check/multi-coupon payments

  • Credit card payments

  • Foreign coin or foreign items

  • Unreadable or damaged items

  • All correspondence


The above items will be sent to the below address:

Social Security Administration
Remittance & Accounting Unit
Attn: DMS Chief
300 Spring Garden Street, 3rd floor
Philadelphia, PA 19123

Once received, MATPSC will follow current procedures located in GN 02403.000 to process remittances.

D. Post Transaction Record Updates

US Bank will include an Individual Reference Number (IRN) in the daily file for all remittances processed by the lockbox. This will assist us to process check returns, and check adjustments, etc. An IRN is a unique number generated by US Bank sent to Treasury’s CIR. As a result, the IRN ‘LCK########’ will appear in the 'Receipt Number’ field on the daily detail file and in the Receipt Number field of the REQD screen in DMS. The number #will be the last 8 digits of the IRN.

E. References

GN 02403.000 Procedures for Handling Remittances and Premium Payments in the Field Office


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GN 02403.163 - Processing Programmatic Remittances through the Lockbox - 01/22/2024
Batch run: 01/22/2024