Bank of America does not accept my mailbox number.
Some banks, such as Bank of America, may not allow you to enter your mailbox number when you attempt to update your address online. This is a validation issue on their side.
Our customers have reported that the best way to update your mailing address with the mailbox number is to call the bank or financial institution directly and speak with a customer service representative.
Please note that if you are looking to use the mailbox address in place of a physical business address (not mailing address), this may not work as banks require specific requirements. Learn more here: mailbox address vs physical address