Owner's identity documents: All documents must be provided as a Base64 encoded string of the document's content.The front side of the identity document is mandatory. This can include either just the front side or both sides (recto-verso) of the identity document.The back side of the identity document is optional. You only need to provide it if you have already submitted the front side and vice versa.Additional identity documents are optional. You may submit other identity documents that you believe are relevant, such as a document used as proof of address, or one containing your code and signature.