My husband is certain that people are using his money to buy magazines and taking other money out of his account. He talks about seeing magazines in his name "all over" and he hadn't subscribed to them, as well as money being stolen. I have tried showing him a bank statement and a simple list of our bills, but he is getting very aggressive, wants to call the bank and demand that the money be replaced and ask why they are giving his money away. We have a joint account where all of our money, is direct deposited and then most bills are on autopay. Help!
As someone else said, it isn't helpful to contradict someone with dementia, it just makes things worse. Climb into the dementia with him when you talk to him about his fears that someone is stealing his money. Be there with him. Without admitting that he is right, that someone IS stealing from him, compassionately explain to him that you understand that he is upset and frustrated and will he trust you to take care of it? It may not sink in the first time or two but persevere. Continue to tell him that you have taken care of it and there's nothing to worry about.
There are others here who can probably respond better. The thing is to enter into his world to a degree. These concerns are very real to him. If you flat out say there is nothing to be concerned about, he won't believe you and will get upset. You may get some help by calling an Alz association too. ((((((hugs)))) This is a very tough journey.