Russian President Vladimir Putin issued a decree ordering companies from countries on Russia's ''unfriendly'' list to start paying for natural gas shipments using rubles starting April 1, and he added that Russia would cut off gas to companies that do not pay using the Russian currency, Bloomberg reported March 31. The decree includes a mechanism that enables customers to make payments in euros to a special ''K'' bank account at Gazprombank, after which the bank will convert the payments to rubles and deposit them into another K account that will be used to pay Russian energy giant Gazprom.