If your agreement clearly identifies what will be yours, you would be able to enforce the agreement should he take the items belonging to you. If the agreement specifies when you may pick up your property and he is not allowing that to happen, then he is already in breach of your agreement. If he has an attorney, you could contact them to resolve the matter. If the agreement does not identify specific items as yours or a process for completing the physical transfer of those items, it sounds like the personal property sections of your agreement may be incomplete.
If you are unable to access the house as you indicated, it may be helpful to write a letter to your spouse indicating that these are the items that you expect to remain in the home, and that they are yours as specified in the agreement (if not in the agreement) then you are giving him prior notice of what exactly you are claiming as your property, either from the marital property or otherwise.
In certain counties, sheriffs have assisted a party retrieve their belongings from the marital home as long as you clearly can show you have a right to obtain those items. It would be very helpful if your agreement stated exactly what belongs to you and how and when you could obtain it. Without consent to enter the home, you may be forced to wait.
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