3 sisters in joint tenancy of a house that has set empty for past 6 years 1 of them refuses to let the others in if they get in she changes the locks is this legal?
No. All three co-owners have equal rights in the property. Your sister cannot legally prevent you from entering the house or from the full use and possession of it. However, if you do nothing your sister may be trying to set up an adverse possession claim. You should speak to an attorney about partitioning the property. Perhaps it should be sold and the proceeds divided equally between the three co-owners.