appian_case_id). When a case requires multiple documents, upload them one per request, using document_number to indicate the position of the document (starting at 1) and documents_count to indicate the total number of documents for the case.proof_of_funds - evidence of the origin of the funds used by the userproof_of_wealth - evidence of how the user's overall wealth has been accumulatedapplication/pdf, image/jpeg, image/png.