The number of shareholders of a credit union is limited and formalized by a list. Limit of the number is defined by the assembly and such assembly establishes the charter. The difference between credit unions and banks is clearly is apparent when comparing the structure of assets and liabilities of credit unions and banks. At the organization of the credit union it is important that people know each other and know the extent to which each of them is trustworthy. All the members of the credit union, regardless of gender, ethnicity, religious and political beliefs, as well as the size of the monetary share have equal rights. The relationship of shareholders with credit union are not client-based, they are co-operative, based on different principles and standards, in particular, on the principles of the law of obligations. Credit unions are competitors of savings institutions, adding interest on deposits of members. This applies to the shares, as well as to additional funds transferred to the account in the credit union. Shareholders in corporate organizations are basic credit unions, besides the same union can be a shareholder of several corporate organizations. Standards by which credit unions build their work do not coincide with the standards and regulations of consumer cooperation of the usual type. A potential new member of a credit union must submit a recommendation of shareholders in which the referee becomes a warrant of a future member of the credit union.