Bulk TIN Verifications

If you have a large quantity (> 50,000) TINs to verify all at once, we suggest you use our Bulk TIN Verification option. Read below to learn how to enable this option for your Abound account.

Get Approved to Bulk Verify TINs

Please contact your Abound representative to start the registration process where we seek to get approval for your company to Bulk Verify TINs. Abound will assist each step of this process.

This process can take up to a week to get all the required approvals.

Sending Bulk Data

Once approved for Bulk Verification, we will enable your account to be able to upload CSV files with up to 20M rows. The format of these CSV files should be N number of rows with two columns: name, tin.


Processing time

The turn-around time for Bulk TIN Verifications is approximately 24 hours.

Retrieving results

As each TIN Verification is completed, Abound will send the corresponding webhook notifying you of the status. Once notified you may call our LIST /tin-verifications endpoint to view all the results.

Here is an example of the results:

        "id": "tinVerificationId_sample41SD71AV8f",
        "createdAt": "2023-01-01T00:00:00.000Z",
        "status": "MATCH",
        "name": "Acme Inc.",
        "tin": "*******00",
        "tinType": "BUSINESS",
        "tinFingerprint": "tinFingerprint_samplehy2BWO6JJG"
        "id": "tinVerificationId_sample8Udke6EyH",
        "createdAt": "2023-01-01T00:00:00.000Z",
        "status": "MISMATCH",
        "name": "Ada Consulting",
        "tin": "*******99",
        "tinFingerprint": "tinFingerprint_samplehy2BWO6JJG"


Exporting Results

If you require the results to be exported in a different format, please contact us.