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TIN Check for more than 140 countries


Croatia Croatia
Official country information

TIN validation guidance for Croatia

Access country-specific reference information, recognised formats and validation resources designed for compliance teams, finance departments and enterprise operations.

TIN Check Croatia (HR)

In Croatia, the Taxpayer Identification Number TIN is designated by Personal Identification Number (OIB) and is issued by the Tax Administration. The TIN / OIB have the same format and structure for Individuals or Entities.

To validate a tax identification number from Greece, the TIN / OIB must be placed on top of it, which must obey the following format:


For Individuals or Entities

The TIN / OIB assumes the following format:
• NNNNNNNNNNN (Total of 11 digits)

N identifies that it must be a numeric digit.

After validation, additional information on the TIN / OIB introduced will be made available

Reference formats

Official example structures

Use the following examples as guidance for commonly recognised tax identification formats.

Individual

Trusted by professional and regulated sectors

The TIN Check ecosystem supports workflows where verification quality, auditability and speed are essential.

banks

Banks

Used to support identity, compliance and tax data validation in financial onboarding processes.
trading applications

Trading Applications

Supports tax identifier validation in digital investment, brokerage and trading environments.
billing softwares

Billing Software

Improves customer registration, invoicing accuracy and fiscal data consistency.
e-commerce

E-Commerce

Accelerates order capture and reduces manual tax identification handling in online sales operations.
trading companies

Trading Companies

Useful for cross-border supplier, client and partner tax identity verification workflows.
tax authorities

Tax Authorities

Supports structured reference and validation processes in public-sector and fiscal administration contexts.
tincheck dashboard
Operational management

Manage validation activity with a more professional dashboard experience

The TIN Check dashboard has been designed to offer a cleaner and more reliable operational interface for recurring validation needs. It supports organised usage, clearer workflows and a more suitable environment for business teams handling customer, supplier or compliance data.

For organisations requiring repeat validations, account-based access provides a more controlled and scalable experience.

Learn more about secure access →

Reference articles and country guidance

Explore selected country-specific content to better understand regional tax identification practices and documentation contexts.

United States tax id number

Tax ID Number in the United States

General guidance regarding the role and use of tax identification records in the United States.

United Kingdom VAT number

VAT Number in the United Kingdom

Introductory information regarding VAT registration references and UK business identification use cases.

Security and reliability

Designed with security-conscious workflows in mind

TIN Check applies layered controls to support a safer validation environment for business users. The platform is structured to operate with modern protection measures, controlled access paths and secure handling expectations suitable for professional usage.

More information