According to the letter of the Federal Tax Service of Russia from June 22, 2011 № ED-4-3/9876, to confirm the costs of a business trip you will need:
Cash register receipts
Slips (checks) of electronic terminals (when conducting transactions using a bank card you hold)
A certificate (receipt) from the bank confirming the payment
Other documents confirming the payment made and drawn up on an approved form of strict accountability
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