Decide whether you want the house sold or not.
2. Depending on what you want to happen, write to your former partner stating you are aware that they are trying to sell the property and that they need to either involve you in the sale or stop the sale immediately (depending on your objective).
3. Next, urgently write to the real estate agent advising them of your interest in the property and request that any proceeds are held in a trust account.
4. Finally, once you know who the conveyancing solicitors are, send that same letter to them asking that all the proceeds are held in trust.
5. If necessary, you may need to commence Court action.