Entity & TIN Validation API

The Entity & TIN Validation API helps financial institutions and reporting service providers validate and standardise key party identifiers used in regulatory and tax reporting workflows. It supports data quality controls for entity details and Tax Identification Numbers (TINs), reducing downstream errors, rework, and submission risk caused by inconsistent or invalid identifier data.

In many reporting regimes, identifier quality issues originate upstream—during onboarding, KYC, client data collection, or entity maintenance—and surface later as reporting exceptions. REGREP’s API provides a structured way to validate and enrich identifier data as part of operational processes or automated pipelines.

Entity identification and TIN quality are critical across multiple reporting regimes and operational workflows, including:

• International tax reporting (e.g., CRS / DAC2, FATCA, CARF / DAC8)

• Client and counterparty data consistency in regulatory submissions

• Group-wide reporting where entities must be matched across systems

• Internal controls and auditability for regulatory data processes

While the exact validation rules vary by jurisdiction, poor identifier quality typically results in filing errors, exceptions, rejection risks, and increased operational workload.

The Entity & TIN Validation API is designed to support:

• TIN validation using jurisdiction-specific format and structural checks

• Entity data standardisation (consistent formatting of core attributes)

• Data quality feedback to identify issues early in the workflow

• Integration into onboarding, data pipelines, and reporting preparation processes

This capability is intended to strengthen data quality at source—before data is used in reporting engines or submission outputs.

Validates TINs using country/jurisdiction-specific structural rules (e.g., length, character sets, checksum logic where applicable), helping detect invalid or malformed identifiers early.

Supports standardisation of commonly used entity attributes (e.g., name fields and core identifiers) to improve matching consistency across systems and reporting datasets.

Designed for integration into existing systems and workflows, supporting automation in:

• onboarding and client data collection

• KYC/operations pipelines

• reporting data preparation and validation steps

Supports consistent validation outcomes and structured feedback that can be logged for operational review, audit support, and process improvement.

The Entity & TIN Validation API is commonly used alongside:

• Tax Reporting Engine (CRS / FATCA / CARF) to reduce identifier-related exceptions

• Data ingestion and validation workflows feeding reporting processes

• Group-wide reporting consolidation where entity matching is required

REGREP does not provide regulatory approval or guarantee acceptance by authorities. The API supports data quality controls that help organisations reduce avoidable reporting errors and operational friction.

• Financial institutions preparing CRS/FATCA/CARF submissions

• Reporting service providers and consultants supporting client filings

• Compliance and operations teams improving upstream data quality

• Engineering teams integrating validation into automated reporting pipelines