My friend lost his wallet.

first of all call the credit card company and inform them that the card was lost so that they can deactivate it and give your friend a new one. Usually it will take 3 to 5 days for the card company to replace the card. Next is to update the people in the area to be careful since your friend has lost a wallet there and lastly to remind your friend to bring just enough money next time and be more careful with his wallet.

Call the banks and any credit card company. Then go to the police to report and get a copy of the report for the card companies. Any other important info that was in the wallet call those places to let them know what happened. I hope it all works out ok for your friend

Report it at the bank immediately so that they can deactivate the lost card first, or else if somebody like took the wallet then your friend might be in great debt..