(Scan picture of the bill)
I think this is a fake :(

YYY: Is this the note you received from me? If it really turns out to be a fake, I will return you the amount in rubles. True, this money came to me from you - with the building from the past arrival of goods. Check at any exchange or bank.

XXX: Just from me? How strange it is. The bank will not take it (I’ll check anyway.

zzz: I suggest you continue to use it in the calculations between each other, and you don’t have to wear it anywhere.