> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ezyshield.com.au/llms.txt
> Use this file to discover all available pages before exploring further.

# ABA file checks

> Upload ABA files to compare payment entries against existing verifications before processing the file elsewhere.

An ABA file check reviews an Australian Banking Association direct entry file before you process it in your banking software or payment workflow.

ezyshield does not initiate the payment. It parses the file, compares entries against existing verifications, and lets you download a regenerated file containing matched entries.

## When to use ABA file checks

Use this workflow when:

* your payment process produces ABA direct entry files
* you already have ezyshield verifications for the payees in the file
* you want to review or remove unmatched entries before processing the file elsewhere

Use [checks before payment](/guides/checks-before-payment) for individual payment decisions outside an ABA file.

## Workflow

<Steps>
  <Step title="Verify payees first">
    Create successful verifications for the payees you expect to appear in the file. ABA file checks match credit entries to the latest successful contact-backed verification for the same BSB and account number.
  </Step>

  <Step title="Upload the ABA file">
    Use [Upload a single ABA file](/api-reference/aba-checks/upload-a-single-aba-file). The endpoint accepts a multipart file upload.
  </Step>

  <Step title="Review the check result">
    Retrieve the ABA check to inspect status and metadata. Use the Dashboard if your operations team needs to review the file interactively.
  </Step>

  <Step title="Download the regenerated file">
    Download the regenerated ABA file. It contains entries matched to verifications, with the total debit amount updated to the sum of those matched entries.
  </Step>

  <Step title="Process the file elsewhere">
    Process the regenerated file in your banking software or payment workflow. ezyshield does not submit the payment.
  </Step>
</Steps>

## API surface

* [Upload a single ABA file](/api-reference/aba-checks/upload-a-single-aba-file)
* [List all ABA checks](/api-reference/aba-checks/list-all-aba-checks)
* [Get an ABA check](/api-reference/aba-checks/get-an-aba-check)
* [Download a regenerated ABA file](/api-reference/aba-checks/download-a-regenerated-aba-file)