Moscow
Not required to. Passengers will be picked up by VIP van and an immigrations officer will gather the crew passports and have a cursory look in the cabin to count crew and make sure there are no other pax on board, they don't care about the food left on. After post flight the handler will gather the crew and immigrations will have your passport ready to hand back to you. Although crew Visas can be procured on arrival (in Moscow only), its best to have your Visa before hand to avoid delays. Be careful on departure, they only allow a limited amount to caviar and cash to be taken out of the country. Message me if you need further details. Good Luck.