Damaged banknote must maintain at least 55% of the original area. This provision applies not only to the ragged money, but and washed, annealed, etc. the Authenticity of banknotes is determined using special equipment that is in each Bank. If you accidentally broke bill, glue and exchanged for a new one. It doesn't matter how many parts it will have. Perhaps even two different bills of the same monetary value, but a prerequisite: one or several fragments must belong to the same banknote and occupy not less than 55% of its original area.
In some cases, will require detailed examination. Then instead of sharing the spoiled bill sent to the regional branch of the Central Bank of Russia. If this or any commercial Bank you have an account, if successful, the result of the examination of the money will go to him. You will need to write a statement indicating your passport details, contact telephone number and denomination of banknotes damaged. As a rule, the examination takes no more than a week and is free. The discovery of counterfeit money is punishable by law.
As for dollars, their exchange is part of the banking business. Depending on Bank policies, you can refuse to exchange any foreign currency or require for this process the Commission ranging from 3% to 10% of the nominal value of banknotes. To change or not to change – decide the banks themselves, as each of them relies on the position of the Bank of Russia No. 199-P "About the order of conducting cash operations in credit organisations on the territory of the Russian Federation". According to this document, the rules of exchange of banknotes of foreign States are developed by the banks themselves. The fees related to the rules of accepting tainted money emission banks (examination abroad, etc.)