Having done many loan closings, yes they will have questions about money being moved and just "appearing". But it's not a big deal if you/he has documentation about the money.
They wouldn't cancel the deal over this and this alone.
Me:40 W: 39 T: 17 years M: 15 years S-9 D-6 D final 11/10/2009
"We are all faced with a series of great opportunities brilliantly disguised as insoluble problems."