PORTLAND — TD Bank officials would not reveal details Friday about a mailing error in which some customers in New Hampshire and Vermont got other people’s financial information with their own bank statements.

The bank said it was unclear whether any customers in Maine were affected, either by receiving other people’s information or having their own information sent to other customers.

The bank acknowledged that an unspecified number of customers in New Hampshire and Vermont received mailed bank statements printed by a third-party vendor that had other customers’ information on them. But the bank, one of the nation’s 10 largest banks, would not reveal the full extent of the problem.

A TD Bank spokeswoman, Kate Toy, said Friday afternoon that she had no information on whether the problem extended to Maine customers.

“I can’t share the name of the vendor. I can’t provide any additional information on the location or number of impacted customers,” Toy said via email. “We are contacting all customers who are impacted by this incident and will offer two years of credit monitoring services at no charge. At the same time we are working with our vendor to make enhancements to ensure this does not happen in the future.”

TD Bank said the error is not considered a security breach or fraud. Under Maine law, companies are required to disclose information about data breaches or losses, although no formal timetable governs how or when companies must notify customers. Last year, as many as 267,000 TD Bank customers were affected by the loss of two data backup tapes that contained personal information such as Social Security numbers and driver’s license numbers. That data loss affected 34,907 residents in Maine. The company took six months to alert the attorneys general in the affected states.

The data loss affected customers in at least six states, and included names, addresses, dates of birth and account numbers. Customers in Maine, Massachusetts, Rhode Island, Connecticut, Maryland and California were affected.

Scott Dolan can be contacted at 791-6304 or at:

[email protected]

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