@tsta456926 , mortgage document ONLY assigns / recognizes liability i.e. your ex is still liable for the amounts owed. Generally title document of the property is the main document that declares ownership ( the lender having a claim against it for the amount of mortgage) and usually both documents reflect the same names but do not have to be. If your ex is still on the title deed then he/she is still part owner as well liable for the mortgage amount.
Does this answer your query ? Is there more I can do for you ?
