I can't think of any lender willing to waste time on a short sale offer without some sort of evidence that the buyer is capable of performing his/her end of the contract.
Some lenders, in fact refuse to consider a short sale offer at all without a pre-approval of the buyer from their own retail mortgage division.
You'll need some gentle persuasion to help your client succeed with his/her purchase.
Lisa Allen, REALTOR, CDPE, SFR
Short Sale Specialist
Tell your client to go speak with an Attorney experienced in short sales.