When one gives ACH access to their bank account they are giving away control. ACH access allows for unlimited deposit and withdrawal access. Never give ACH access to your account.
Discussion
it's also unnecessary. idk about other providers but vodafone portugal lets you pay ahead for your phone subscription. i just top it up for 3 months ahead and hardly have to think about it
That's what I heard a lot of. All I can see is that they could withdraw more than expected, but I can also cancel the authorization any time. My credit union isn't on their list of banks anyways.