Words to look for: “as joint tenants,” “with right of survivorship,” or “JTWROS.” Deeds write it as “right of survivorship” or “rights of survivorship.” Same form, same result.
When one joint tenant dies, their interest doesn’t pass to their heirs. It doesn’t pass through their will. It ends at the moment of death, and the surviving owner automatically owns the whole property by operation of law [1]. No probate. No court. The will is irrelevant to this asset, which surprises people who wrote a will saying otherwise. Survivorship wording on a deed beats a will, every time.
Two rules travel with this form. First, joint tenants hold equal, undivided interests; unequal shares break the joint tenancy [1]. Second, the deed has to say it. Arizona’s statute spells it out: a deed to two or more people creates an estate in common unless it expressly declares a joint tenancy with right of survivorship, and a silent deed to a married couple runs under community property rules instead [3].
Survivorship also isn’t permanent. A joint tenant can transfer their interest while alive, and that transfer breaks the joint tenancy and the survivorship right with it [1]. Arizona goes further and lets any joint tenant end the survivorship by recording a termination affidavit [3]. People do this in divorces and family fights, sometimes without telling the other owner. If it matters, pull the current title record, and not the deed in your filing cabinet.
The survivor has one job: paperwork. You record a certified death certificate, usually with a short affidavit of survivorship, at the county recorder; Arizona, for example, spells out exactly that two-document filing in its statute [3]. That cleans the dead owner’s name off the title so you can sell or refinance later. Do it soon. Title problems get more expensive the longer they sit.