Who Needs to Sign a Property Management Agreement?

We sign up a lot of owners for our property management services. Once signed up, we check the county records to see if we have signed up the actual owner of the property.

Some of the time we sign up an owner that has a spouse who is not present at the meeting. So we just sign up that spouse and follow the directions of the person we met.

Recently this happened and then we got a call from the other spouse stating that they were getting a divorce and she wanted the rent money. My first inclination is to stop everything and wait until the two of them work it out. My backup plan is start writing owner proceeds checks in both of their names so they both must sign the checks.

Anyone got a better plan?