My partner and I are going through an acrimonious separation. I was forced out of our jointly owned house but am about to return until such time as we can sell it. He wanted to buy me out but has been so vile that I've decided not allow him. My concern is that while we are co-habiting the house, I will be subject to visits from his family who were pivotal in the breakdown of our relationship. Can I block their access?
Joint tenancy means that you both have equal (full) rights to the entire property, so just as you don't his permission to live there or to invite guests, he doesn't either. Unless they threaten you in some way (and you get a court order barring them from entering), there is no legal means to deprive an owner of their property rights, while they are still an owner.