ACH — entry hash mismatch (truncated or tampered file)
A PPD credit file whose entry hash is wrong. The entry hash is the sum of the 8-digit routing numbers of every entry, truncated to its last ten digits — a checksum whose only job is to catch a file that lost, gained or had an entry altered in transit. Here the batch control and the file control both declare 28905251 while the four entries add up to 27905251. The amounts still balance, which is the point: the hash is the control that fires when nothing else does.
Nacha 94-character — Invalid
A PPD credit file whose entry hash is wrong. The entry hash is the sum of the 8-digit routing numbers of every entry, truncated to its last ten digits — a checksum whose only job is to catch a file that lost, gained or had an entry altered in transit. Here the batch control and the file control both declare 28905251 while the four entries add up to 27905251. The amounts still balance, which is the point: the hash is the control that fires when nothing else does.
What this file shows
A PPD credit file whose entry hash is wrong. The entry hash is the sum of the 8-digit routing numbers of every entry, truncated to its last ten digits — a checksum whose only job is to catch a file that lost, gained or had an entry altered in transit. Here the batch control and the file control both declare 28905251 while the four entries add up to 27905251. The amounts still balance, which is the point: the hash is the control that fires when nothing else does.
| Transactions | 4 |
|---|---|
| Total | $10,403.25 |
| Date in the file | 2026-07-12 |
The defects it carries
- EntryHashBatch 0000001 : Entry Hash déclaré (28905251) ≠ somme calculée des routing numbers (27905251).
- EntryHashFile Control : Entry Hash déclaré (28905251) ≠ somme calculée (27905251).
Quoted verbatim from the validator, not paraphrased.
Every party, IBAN and amount below is fictitious. The IBANs are structurally valid — they pass the mod-97 check — but they belong to no real account.
File content
101 091000019 0910000192607121200A094101RECEIVING BANK ORIGIN BANK
5220ACME MFG INC 1234567890PPDPAYROLL 260712 1091000010000001
6220210000214512338901 0000285000EMP-00114 SARAH T MILLER 0091000010000001
6221210428827788990011 0000312450EMP-00115 DAVID R OKONKWO 0091000010000002
6320260095939900112233 0000198075EMP-00116 LIN CHEN 0091000010000003
6221110000253344556677 0000244800EMP-00117 MARCO ROSSI 0091000010000004
822000000400289052510000000000000000010403251234567890 091000010000001
9000001000001000000040028905251000000000000000001040325
9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999
How we know these results hold
Every file in this library is run through the site's own validator on each build. The expected result stated above is asserted by an automated test — if a file stopped matching what this page claims, the build would fail. Two inherited fixtures were repaired this way before publication: three IBANs failed the mod-97 check and several names used characters outside the basic SEPA character set.
ACH / NACHA file (US)
- ACH — a returned WEB debit (R01, insufficient funds)
- ACH — a notification of change (C01, corrected account number)
- ACH — an international entry (IAT) with its seven mandatory addenda
- ACH — PPD payroll credits, balanced with an offset debit
- ACH — CCD corporate debits with an addenda 05 remittance
- ACH — WEB debits (e-commerce, recurring and single-entry)
- ACH — CTX with seven addenda 05 carrying an EDI 820
- ACH — batch control debit total ≠ the sum of its entries
- ACH — invalid ABA 3-7-1 check digit on an entry routing number