Dna samples , photo , Photographic evidance of his own , finger prints , all bank notes checked for quality a well as qantity.
All for an item he could have purchased " and had delivered " without half this hassle.
still if you get him to walk you to bank , he could have the benefit of doing a bank job as well as being a mass murderer. lol
the best you can do is check the notes , im sure they will be fine though.
as for the second account in nigeria , well lets face it we have a lot of foreign workers in this country , so someone is bound to meet one or two at point.
if your honestly worried have a friend there at time of sale.
all the best potty64