Yes- we already thought about the circumstance that if we breakup then 1. the property would be sold to a third party or 2. One person would buyout the other. Do we need an additional document other than the Joint Tenancy with Right of Survivorship that includes this?

Yes- we already thought about the circumstance that if we breakup then 1. the property would be sold to a third party or 2. One person would buyout the other. Do we need an additional document other than the Joint Tenancy with Right of Survivorship that includes this?