You don't have to sign anything that you don't agree with. If he files for custody of your daughter, you can notify the court that you are deployed and they have to continue the case until you have returned. The same is true if he files for divorce. Once you have returned from deployment, you will be able to participate in an actions. He cannot legally sell your personal property and if he does, he should be required to compensate for anything he disposed of. You do need to try to find out and keep track of where he is living so you will be able to take action once you have returned.