To complete Level 4 verification on Stake, you must prove the source of your funds. This involves providing a photo or scanned copy of documents that demonstrate the source of your income, such as a pay stub, documentation of stock or investment sales, inheritance, company sale, lottery winnings, cryptocurrency mining records, or any other relevant documents. Specific Requirements: Accepted documents: Pay stubs, documentation of stock or investment sales, inheritance documents, company sale documentation, lottery winnings receipts, cryptocurrency mining records. Documentation Quality: Images must be high-resolution and in color, and the document must be easily legible. Format: Original photos or PDF scans are accepted. Validity: The document must be valid for at least 3 months. Not accepted: Screenshots, damaged documents, digital documents, or illegible documents. Steps for Level 4 Verification: Identify Source of Funds: Determine your source of income (payroll, investments, etc.). Prepare Documentation: Obtain original documentation or a PDF scan of your selected source of funds. Upload Documentation: Upload the documentation to the Stake platform, following the instructions provided in your user profile. Note: The verification process may take a few minutes to complete, according to the FAQ page.