You may contact us by telephone, email, or by visiting any branch.
Connecting all offices:
Merrimack24 Telephone Banking (for automated telephone banking)
Toll-Free 888-224-MCSB (6272)
If you should notice any fraudulent transactions on your debit card outside normal banking hours, please note that you are able to restrict your own debit card by calling our Processing Center at 1-866-546-8273.
By Secure Form
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