Mercury's personal banking product allows you to reject ACH transactions before they clear. They also allow you to generate virtual account numbers, so you can easily cut off an entity without having to change your main account number. Unfortunately Mercury charges a monthly fee.

That's pretty cool! I didn't know about that.

For anyone curious, the fee is $240/yr.

I used Mercury when I had an LLC and had a great experience. It feels like they're the only bank that's not 10 years behind in technology. I've never tried their personal banking, but the ACH denial power makes me a lot more curious.