1. Project/Contract Details: Information about ongoing contracts or projects contributing to income, used when proving income stability

2. Business Expense Overview: Summary of business expenses, relevant when net income needs to be demonstrated

3. Future Income Projection: Statement about expected future income, useful for mortgage or loan applications

4. Professional Certifications: List of relevant professional qualifications, included when required by specific institutions

5. Third-Party Verification: Additional verification from an accountant or financial advisor, added when required by the receiving party

1. Tax Return Copies: Previous year's tax return documents showing declared income

2. Bank Statements: Recent business bank statements showing income transactions

3. VAT Returns: Copies of recent VAT returns demonstrating business activity

4. Profit & Loss Statement: Summary of business income and expenses for the relevant period

5. Client Contracts: Copies of major ongoing contracts proving income sources

6. KvK Extract: Recent extract from the Chamber of Commerce registration