Sovereign Bank 16 Centre Ct, Lynnfield, MA01940 Sovereign Bank in downtown Lynnfield has been at this same location since 2000. Sovereign bank is now a part of…More Santander. This branch offers a variety of products and services, including checking and savings accounts, auto loans, IRAs, credit cards, safe deposit boxes and more. There is teller service and an ATM. The interior is spacious and has a nicely decorated waiting area to sit down in while waiting to speak to a bank representative.