Is it possible to upload additional Documents? 

 Yes, if you wish to upload an additional or new document to your account, you can do so by accessing the Settings section on your FXSway account. Click/tap on Upload Documents

 Select the Document Type and choose between the Type options (Proof of Payment, Bank Statement, or Other). Then Drop/upload the document. You can add a note regarding the document. To finish your submission, click/tap on the Upload a Doc button.