Bank of America announced Thursday that it would charge debit card users $5 a month when they shop. (Guy Calaf/BLOOMBERG)

So what can you do to avoid pesky fees? At least one consumer group is offering up some tips. In a statement released Thursday, Consumers Union suggests paying attention to the enclosures in mailings from your bank, as those might give you an early heads-up about possible new fees.

The group also says that many banks first try out new fees as “trial balloons” to see if customers will tolerate them. Given that a fee might only be an experiment, Consumers Union says consumers should complain to the bank, as they might ax the fee if enough customers gripe about it.

Have you discovered any useful strategies for avoiding bank fees? Tell us about it in the comments section.