The penalty is $30/form that was filed late (after March 30 and before Aug 1). You may be able to get a waiver of the fine. (see p. 13 of the General Instructions for 1099:
http://www.irs.gov/pub/irs-pdf/i1099gi.pdf) [thanx to David Rigby for pointing me there a coupla months ago...]
However, I'd figure out a response to the person if and when he or she comes back and asks for reimbursement of the cost to amend personal income taxes.