CTX (Corporate Trade Exchange) is a corporate ACH format which allows for up to 9,999 addenda records with approximately 800,000 characters.
With this large addendum record capability, full and complete remittance information can be transmitted with the CTX payment. One CTX payment can cover multiple invoices since full remittance information will be transmitted to the vendor's financial institution with the payment.
The ACH CTX format includes an entire X12 820 transaction set in its addenda records. Though traditionally used for Vendor Payments, the CTX format can also be used by agencies to make payments of Allotments and Deductions (e.g., making one monthly CTX payment to a union that covers union dues deducted from all members’ salary payments).
The Bureau of the Fiscal Service (Fiscal Service) originates CTX payments which contain 820 Transaction Sets formatted according to X12 Version 3040. Fiscal Service has no current plans to change versions.
Child Support Payments
Federal agencies have the option to process child support payments by using either the Cash Concentration or Disbursement (CCD+) format or the Corporate Trade Exchange (CTX) format to a state child support enforcement agency or its state disbursement unit (SDU).
The X12 820 has the capability to pass full and complete remittance information with the CTX payment.
Although the CCD+ ACH format is primarily used for child support payments, Fiscal Service at Austin Financial Center will assist federal agencies interested in developing ACH Corporate Trade Exchange (CTX) payments.
Electronic Data Interchange X12 Standards, Version Release 3050 or later, is required to process CTX Child Support Payments. Federal agencies are advised to contact the Austin Financial Center prior to making any programming changes.
Payment Management Help Desk: 1.855.868.0151
Defense Finance and Accounting Service