@squaredcc2 - Since the settings to adjust your bank account are available from your Square Dashboard, anyone that has your username and password would be able to access these settings. Having said that, in order for any bank account changes to start, you would have to confirm the change by clicking on a confirmation link that we email directly to the address tied to the account. If you'd like to further secure your Square Dashboard, I'd also suggest checking out this article on 2-Step verification.
PS) If my answer solved your problem, would you mind marking it as "Best Answer"? That'll help the rest of the community find what they're looking for. If not, just write back, and I'll continue to help. Thanks!
Sean
he/him/his
Product Manager | Square, Inc.
