So you are entering into a $2.5 million dollar deal to buy a tank...
...I would have thought there would be some form of paper trail, contracts, etc. to prove this situation one way or another?
You don't just send a cheque out of the blue through the post with a post it note slapped on saying "This is for the Panzer IV!"
Or maybe you do if you are a billionaire?
By the way the FHC has a nice blog here - http://flyingheritage.tumblr.com/
Plenty of interesting facts and oddities about the aircraft they look after.