They will want to know where the money is coming from -- usually friends or family. They will want to see evidence of the funds ( bank statement) and proof of ID of the donor. Monies are usually transferred direct from the donors bank account to the IVA providers client account (not via your bank account).
They will have to present your offer to creditors and any supporting reasons you can give will help.
My opinions are merely that .. opinions based on experience. Always seek professional advice.
IVA Completed 23rd July 2013 .... C.C. 10th January 2014