My lawyer asked me to send him checks for creditors on my dad's estate. But to leave payable to blank and sign them. Is this ok? I don't trust him.

I'm the executor of the estate. My dad had one account with no heirs listed, so the money in it is supposed to go to credit card debts he had and 3k will go to lawyer for his fees. The creditors have filed claims long ago. I live out of state. My attorney said he wanted to try and get the creditors to drops their claims but to go ahead and send him estate checks, signed by me, with the amount, and leave out who it's payable to. He said he'd keep them in a "vault" and he'd know in a few months if that went through. I just don't really trust him. We started this process in the summer of 2012 and it's still going on. Just seems strange... Like that should've been sorted by now. Any advice on what I should do? Or how to be on top of things so I know everything is going in my favor. I'd obviously love to not have to pay the creditors and keep the money. I'm worried he's taking advantage of me because I'm young, out of state, and am clueless on how this stuff works.