Generate a valid NACHA ACH file for ACH origination

Steps

1. Construct the File Header Record (Type 1) with your ODFI routing number in the Immediate Origin field, destination routing number in Immediate Destination, file creation date/time, and a unique File ID Modifier
2. For each batch, write a Batch Header Record (Type 5) specifying the SEC code (e.g. PPD, CCD, WEB), Company Name, Company ID, Effective Entry Date, and Service Class Code (200 mixed, 220 credits, 225 debits)
3. Write individual Entry Detail Records (Type 6) with the RDFI routing transit number, check digit, receiver account number, transaction code, amount in cents (no decimal), Individual Name, and a unique Trace Number formatted as ODFI routing (8 digits) + sequence number
4. If addenda are required (e.g. for IAT or corporate payment detail), append Addenda Records (Type 7) immediately after the related Entry Detail Record
5. Close each batch with a Batch Control Record (Type 8) containing entry count, hash total of RDFI routing numbers, and debit/credit totals; then close the file with a File Control Record (Type 9)
6. Pad the file to a multiple of 10 lines using nine-filled dummy records (Type 9) and validate that all hash totals and record counts match before submitting to your ODFI