My husband and I have joint bank accounts. He told me almost a year ago he no longer loved me anymore he said he is planning on divorcing me however does not seem to have made any effort at all to even move out. His behavior has become very unlike him and I still haven't figured out if it is a mental health issue, addiction or an affair. He is the main account holder on most of our joint accounts except one. I have noticed that he has almost depleted one of our accounts and has been taking large sums of money out of the ATM. I need this to stop ASAP and protect the rest of our money. Before I confront him I was thinking I should put a hold on the account that I am the main account holder. Is this possible or is it possible for me to take his name off the account? I not planning on spending it I just need to make sure he doesn't spend it all! Please any advice that could be given as all as possible as I know I need to act on this and confront him.

From your description it sounds like he's having an affair. Don't confront him with your suspicions at this point. He will deny.

Start quietly snooping. Can you see his emails or texts? Has he talked about someone in particular in the last year or so? Check out the Operation Investigate forum for ideas on how to investigate what your H is doing on the secret.

Meanwhile, be sure you avoid all love busters and do your best to be friendly and cheerful.

Do you have children? How long married? Does your H travel for business?

How has he been acting differently? Is he detached and indifferent to you? Angry? Picking fights?

Please read this.
Surviving an Affair-Start Here First

Addressing purely the financial question, why not open an account in your name only and put the money in there?

It seems to me that the real concern should be with your marriage. Are you interested in saving your marriage? You need to get to the bottom of what is going on with your husband.

Open an account in your name only and transfer the money. A joint account is a joint account. You can not put a hold on it. It makes no difference who is "primary"...I am assuming you mean this as who is listed first and/or whose SSN the interest is reported under. That makes zero difference when it comes to access. You can not remove another person from a joint account. The account would have to be closed.