What could this be for?

Anyone know what this is? I called the number on it and it says thanks for calling square. There’s 3 of them.

****My husbands bank account. We haven’t joined are banks yet and I was checking on a bill, and noticed this. We haven’t went to any small businesses. And he’s been working strange hours this week. At first I thought it was vapes but it’s on there and had taxes. He works thirds, so he’s sleeping right now so I can’t ask until tonight.