post
https://api.sandbox.com/v1/beneficiaries//files
Uploads supporting documents required for beneficiary KYC/KYB verification and compliance. Documents can include government-issued IDs (passport, driver's license, national ID), proof of address (utility bills, bank statements, lease agreements), business registration certificates, articles of incorporation, or tax registration documents. Specify the document type and classifier (FRONT for front of ID, BACK for back of ID, FACE for selfie). Supported formats typically include JPG, PNG, PDF with maximum file sizes of 5-10MB. Documents are automatically processed for verification and may trigger identity checks or manual review.