What are the facts?
John and William Harms owned a residence as joint tenants with right of survivorship. William agreed to assist his friend, Charles Sprague, in financing the purchase of a separate property; to do so, William executed a promissory note and secured it by granting a mortgage on his undivided interest in the jointly owned residence. John neither joined in nor consented to the mortgage, and title to the residence otherwise remained unchanged in the brothers as joint tenants. Thereafter, William died. In a will executed prior to his death, William purported to devise his interest in the residence to Sprague. Sprague sought to enforce the mortgage against the residence and to claim an interest through William's will, while John asserted that the joint tenancy had not been severed and that he took full title by survivorship, free and clear of any lien arising from William's unilateral mortgage. The dispute culminated in litigation to determine whether William's mortgage severed the joint tenancy and whether the mortgage remained a valid lien on the property after William's death.
What is the legal issue?
1) In a lien-theory jurisdiction, does the execution of a mortgage by one joint tenant on his undivided interest sever the joint tenancy? 2) If not severed, does the mortgage remain a lien on the property after the mortgagor joint tenant's death so as to encumber the surviving joint tenant's title?
What rule applies?
In a lien-theory state, a mortgage creates only a lien on the mortgagor's interest and does not transfer legal title; therefore, a unilateral mortgage by one joint tenant does not sever the joint tenancy because it does not destroy any of the four unities (time, title, interest, possession). Upon the mortgagor joint tenant's death, the survivor's right of survivorship vests in the entire estate; because the decedent's separable interest is extinguished at death, any mortgage lien that attached solely to that interest does not survive to burden the survivor's title. A joint tenant's will cannot devise the joint tenancy interest because the interest passes by survivorship at death.
What did the court hold?
No. The mortgage executed by William Harms on his undivided joint tenancy interest did not sever the joint tenancy. Further, upon William's death, the joint tenancy's right of survivorship operated to vest full title in John Harms, and the mortgage lien—having attached only to William's extinguished interest—did not survive to encumber John's title. The attempted testamentary disposition of the joint tenancy interest was ineffective.
What is the reasoning?
The court began by identifying Illinois as a lien-theory jurisdiction, meaning a mortgage is not a conveyance of legal title but merely a security interest in the mortgagor's estate. In joint tenancy, severance ordinarily requires destruction of one of the four unities through a conveyance that changes the nature of the title or the cotenants' relationship. Because a lien in Illinois does not transfer title and leaves the unities intact, a unilateral mortgage by a single joint tenant does not effect severance. Turning to the effect of death on the lien, the court emphasized the distinctive feature of joint tenancy: the right of survivorship. At the moment of William's death, his undivided interest ceased to exist as a separate estate; the entire fee vested in John by operation of law. Since the mortgage lien attached only to William's separable interest, and that interest was extinguished at death, there was no remaining res to which the lien could adhere. The court rejected arguments that the lien should follow the property into the survivor's hands, reasoning that to allow persistence of the lien would erode the survivorship feature central to joint tenancy and would functionally treat the mortgage as a title transfer contrary to lien-theory principles. The court also dismissed the testamentary claim, noting that a joint tenant has no devisable interest that passes at death; instead, survivorship controls. Any beneficiary under the mortgagor's will—including Sprague—could not take the jointly held property because it did not become part of William's probate estate. As for the lender's position, the court observed that nothing prevents a creditor from protecting itself by requiring both joint tenants to sign the mortgage, obtaining additional collateral, or adjusting the loan terms to reflect the risk that its lien will evaporate if the mortgagor joint tenant predeceases the non-mortgaging joint tenant.
Why is this case significant?
Harms v. Sprague is a cornerstone joint tenancy case that: (1) illustrates how the lien-versus-title theory of mortgages directly affects severance analysis; (2) reinforces that survivorship trumps an encumbrance tied solely to a deceased joint tenant's interest; and (3) cautions lenders about the hazards of taking security from fewer than all joint tenants. It is frequently taught in Property to test understanding of the four unities, the mechanics of severance, and the interaction between nonprobate transfers and creditor rights. The case also provides a practical framework for advising clients about financing arrangements and estate planning in co-ownership contexts.
Does a mortgage by one joint tenant always fail to sever a joint tenancy?
No. The result depends on the jurisdiction's mortgage theory. In lien-theory jurisdictions like Illinois, a mortgage is only a lien and does not sever. In title-theory jurisdictions, a mortgage operates as a transfer of title, which can destroy the unity of title and sever the joint tenancy. Always check local law.
What happens to the mortgage if the mortgagor joint tenant dies before the non-mortgaging joint tenant in a lien-theory state?
Under Harms v. Sprague, the mortgage lien is extinguished upon the mortgagor's death because it attached only to the mortgagor's separate interest, which is eliminated by survivorship. The surviving joint tenant takes full title free and clear. The creditor's remedy is against the decedent's estate, not the surviving joint tenant's title.
Can a joint tenant unilaterally encumber his or her undivided interest without the other joint tenant's consent?
Yes, a joint tenant may mortgage or otherwise encumber his or her undivided interest. However, in lien-theory states, such an encumbrance neither severs the joint tenancy nor binds the other joint tenant's interest. The encumbrance is effective only against the mortgagor's interest and may evaporate if the mortgagor dies first.
Could the lender have protected itself from losing the security interest upon the mortgagor's death?
Yes. A prudent lender might require both joint tenants to sign the mortgage, insist on severance of the joint tenancy (e.g., conversion to a tenancy in common) before closing, obtain additional collateral, purchase credit life insurance, or adjust pricing to reflect the risk that the lien may disappear if the mortgagor dies first.
Can a joint tenant devise his or her interest in a will to defeat survivorship?
No. A joint tenancy interest is not devisable because it does not pass through probate; it terminates at death, and the survivor takes automatically. To direct disposition by will, the joint tenancy must be severed during life—by mutual agreement, partition, or a conveyance that destroys the necessary unities—so that the interest becomes a tenancy in common.
What if the non-mortgaging joint tenant dies first in a lien-theory state?
If the non-mortgaging joint tenant dies first, the mortgaging joint tenant takes full title by survivorship, and the previously granted mortgage then encumbers the entire fee because the mortgagor's interest has expanded to 100%. The lender's lien becomes attached to the whole estate held by the surviving mortgagor.