In the U.S. credit unions timely and full repayment of loans is a common phenomenon. Unpaid and delinquent loans are not more than 3% of their amount. Typically new members of the credit union become citizens having suretyship or recommendations from their friends - members of the credit union. Among the U.S. credit unions, there are three groups that differ in terms of assets, shareholders, and business services. Until the 70's there was a proliferation of the U.S. credit unions due to the increase of their number and the number of shareholders, although it must be acknowledged that there was also and a qualitative growth. Credit unions encourage the proper use of shareholders savings, developing social programs (education, health, recreation, housing, etc.). Corporate alliances are intermediaries between credit unions and financial markets.