Do you need a bank account number and routing number to get a Power of Attorney while overseas deployed?

Well, my husband and I are currently in the midst of separation and will probably be getting all the paperwork done for divorce when he comes home. He seemed like he was going to be nice and civil, but now i'm not so sure. I mean I'm in no way trying to screw him over, but he came home on R&R and that's when we talked about divorce and stuff and now I just feel that everything would be better if I could go home for the rest of deployment and get settled back in at my hometown. Well among moving and separating bills and his yearly annuity soon coming in, which we agreed a long time ago that we would be using to pay off our vehicles, I would need a Power of Attorney to take care of these things. The one we had expired and I've been telling him since November to get it done. Well it's around the time for the check to come in probably early next week and I'm wanting out of the apartment in the next month and a half and he still isn't getting it done. Like I said, I don't want to screw him over or take all the check money or any of that junk, I still care about him, it just would be really benifical if I could get the POA and get this stuff taken care of and paid for. Plus if I get it all taken care of now and I don't have to wait around for him to return, he won't have to worry about any of it. Anyhow, he messaged me today and said that he tried to get a POA done while he's overseas deployed and he said that he couldn't do it because he needed the bank account number and routing number to get it. This just doesn't make sense. You don't have to have an account or any reason at all to instate a person as POA. So it sounds to me that someone else may already have it and that he is just asking this so he can transfer some of the money for me to use to pay off the cars....I don't know what is up with this. Do you really need that info to get one or is he just going behind my back now to do stuff on his own?????