Credit Union Service Centers 6126 W Layton Ave, Milwaukee, WI53220 Credit Union Service Centers offers shared branching. Credit unions from all over the country share facilities to…More give members thousands of convenient locations to perform transactions just as if they were in their home credit union. Whether you are at work, home, or traveling, your credit union is always nearby. Anywhere you see the swirl you can conduct a range of transactions, such as: deposits, withdrawals, loan payments, make transfers between accounts and purchase money orders, travelers checks, official checks and much more. The Greenfield Credit Union Service Center is located on 61st and Layton Avenue in the Greenfield Towne Center and is one of 4200 shared facilities nationwide.