Skip to main content

Acceptable Use Policy

Last updated: March 18, 2026

1. Introduction

This Acceptable Use Policy ("AUP") governs your use of TIN Validator's services. By using our services, you agree to comply with this policy. Violation of this policy may result in suspension or termination of your account.

2. Permitted Use

You may use TIN Validator's services for the following legitimate purposes:

  • Validating Tax Identification Numbers for compliance and verification
  • Integrating TIN validation into your business processes
  • Conducting due diligence and KYC (Know Your Customer) procedures
  • Ensuring data quality in financial and regulatory systems
  • Supporting tax reporting and compliance obligations
  • Developing and testing applications that use our API

3. Prohibited Activities

You must not use TIN Validator's services for any of the following:

3.1 Illegal Activities

  • Any activity that violates applicable laws or regulations
  • Tax fraud, identity theft, or money laundering
  • Unauthorized access to systems or data
  • Violation of privacy laws or data protection regulations
  • Facilitating criminal activity of any kind

3.2 Abuse and Misuse

  • Attempting to bypass rate limits or usage quotas
  • Using multiple accounts to circumvent service limits
  • Sharing API keys with unauthorized parties
  • Reverse engineering or attempting to extract source code
  • Using the service to build a competing product
  • Scraping or mass downloading of data beyond normal API usage

3.3 Security Violations

  • Attempting to gain unauthorized access to our systems
  • Probing, scanning, or testing vulnerabilities without permission
  • Breaching authentication or security measures
  • Distributing viruses, malware, or harmful code
  • Conducting denial-of-service attacks or similar activities
  • Interfering with the proper functioning of the service

3.4 Data Protection Violations

  • Processing personal data without lawful basis
  • Failing to obtain necessary consents from data subjects
  • Violating data retention or deletion requirements
  • Sharing data with unauthorized third parties
  • Using the service to process special categories of data without proper safeguards

3.5 Inappropriate Content

  • Transmitting offensive, harassing, or threatening content
  • Distributing spam or unsolicited communications
  • Infringing on intellectual property rights
  • Impersonating others or misrepresenting affiliations

4. API Usage Guidelines

4.1 Rate Limits

You must respect the rate limits associated with your subscription plan. Excessive requests may result in temporary throttling or suspension.

4.2 API Key Security

  • Keep your API keys confidential and secure
  • Do not commit API keys to public repositories
  • Rotate API keys regularly and when compromised
  • Revoke unused or old API keys
  • Use environment variables or secure vaults for key storage

4.3 Responsible Use

  • Implement appropriate error handling and retry logic
  • Cache validation results when appropriate
  • Use batch validation for large datasets
  • Monitor your usage to stay within plan limits
  • Report bugs and security issues responsibly

5. Data Handling Requirements

When using TIN Validator's services, you must:

  • Have lawful basis for processing the TINs you validate
  • Obtain necessary consents from data subjects where required
  • Implement appropriate security measures for data in transit and at rest
  • Comply with data protection laws applicable to your jurisdiction
  • Not use the service to process data you don't have rights to process
  • Maintain records of processing activities as required by law

6. Monitoring and Enforcement

6.1 Our Rights

TIN Validator reserves the right to:

  • Monitor usage to ensure compliance with this AUP
  • Investigate suspected violations of this policy
  • Suspend or terminate accounts that violate this policy
  • Report illegal activities to law enforcement
  • Cooperate with legal investigations and court orders

6.2 Reporting Violations

If you become aware of any violation of this AUP, please report it to us immediately at [email protected].

7. Consequences of Violation

Violation of this Acceptable Use Policy may result in:

  • Warning: First-time or minor violations may result in a warning
  • Temporary Suspension: Repeated or moderate violations may lead to temporary suspension of services
  • Account Termination: Serious or repeated violations will result in permanent account termination
  • Legal Action: We reserve the right to pursue legal remedies for violations that cause harm
  • No Refund: Accounts terminated for AUP violations are not eligible for refunds

8. Security Research

We welcome responsible security research. If you wish to conduct security testing:

  • Contact us at [email protected] before testing
  • Only test against your own accounts and data
  • Report vulnerabilities through our responsible disclosure process
  • Do not exploit vulnerabilities beyond what is necessary to demonstrate them
  • Do not access or modify other users' data

9. Changes to This Policy

We may update this Acceptable Use Policy from time to time. Continued use of our services after changes constitutes acceptance of the updated policy. We will notify you of material changes via email or through our website.

10. Questions and Concerns

If you have questions about this Acceptable Use Policy or need clarification about permitted uses, please contact us:

General inquiries: [email protected]

Abuse reports: [email protected]

Security issues: [email protected]

11. Related Policies

This Acceptable Use Policy should be read in conjunction with our other policies: