About the institution. Chelsea Groton Bank is identified by FDIC certificate number 18238. The headquarters address shown (904 Poquonnock Rd, Groton, Connecticut) is the institution's main office as registered with the FDIC. For multi-state holding companies, this is the chartered bank entity's main office — which may differ from the corporate brand's perceived home or from the parent holding company's address (e.g., JPMorgan Chase Bank, N.A. is chartered in Ohio while its parent holding company sits in New York).
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