Hello Showup
The origination of your deposits came from your bank etc, that is all they need to know.
If they need stamped or written prove, go talk to your manager at your bank and get him/her to do a print out of your statement, both sign it and fax and/or post a copy back to the "said" broker.
Good luck
Liz
Yesterday I have mailed the notarized copy of my paystub to MRC Markets. This is an intangible proof how I earned this money.
(Note: It took a while to get this document mailed because I was in middle of an international trip when I was asked to provide this).