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TIN Format Validation

Taxbit can evaluate whether a Tax Identification Number (TIN) matches the expected format for the selected jurisdiction. This is a syntax or shape check for character count, character type, and overall structure of both US and non-US TINs.

Syntax validation gives your team earlier visibility into potentially incorrect identifiers across all users. This can improve data quality, support remediation efforts, and increase confidence before downstream reporting activities.

For example, a value may be flagged if it:

  • Has too many or too few characters.
  • Uses the wrong character type for that jurisdiction.
  • Does not match the expected jurisdiction-specific pattern.

Taxbit bases these checks on jurisdiction format rules published through OECD guidance.

 

Finding the Results

You can review the TIN format results for a given account directly within the Dashboard, or in bulk by downloading an export from the Reports page

 

Reviewing the Results

  • A valid format result means the identifier matches the expected format for VATs issued in that jurisdiction.
  • An invalid format result means the identifier does not match the expected format rules for that jurisdiction. You may also see an invalid result to the extent the user did not provide a TIN in a jurisdiction that generally issues TINs.

Please note: Taxbit does not block SDK submissions or form generation solely because a non-US TIN fails a syntax check. Users are allowed to proceed while the issue is surfaced as a warning for review and remediation.

 

Important Considerations

Syntax validation is not the same as confirming that an identifier is registered with a tax authority or belongs to a specific person or entity.

This is important because Taxbit supports multiple identifier-validation workflows. US TIN matching is a separate process that checks a US name and TIN combination against the IRS database. For more information on TIN verification, please refer to the following guides: IRS US TIN Matching