Can multiple files be uploaded as financial proof while opening an account or on Console?

No, multiple files cannot be uploaded. However, all the proofs can be merged into a .Zip file and uploaded.  Visit smallpdf.com/merge-pdf and follow the instructions to merge multiple PDFs into one. If there are multiple image files like .jpg, .jpeg, or .png, copy and paste them on one document and convert it to a PDF. To know how to zip files, visit support.microsoft.com/en-us/windows/zip-and-unzip-files.