Before starting to submit additional client data, Platform needs to upload all supporting documents. Use File upload endpoint to upload document. This endpoint is for file transfer and storage. We storage file until it was used/added in the application endpoint or until the specified file removal date. Currently API accepts one document per request, batch upload is not yet supported.
Based on security requirements, we check not only document type, but content type inside a document as well. E.g. if file extension is .jpg, but actual content type is .exe, then such document is not accepted.
Once you upload all required files, depending on client type (private or corporate), call endpoint POST Initiate personal application or POST Initiate business application.