One whose property is subject to a legal claim

• Person with a mortgage, e.g.
• Many a homeowner
• One with a mortgage, e.g
• Mortgage holder, e.g.
• Person with property, perhaps
• Homeowner, vis-a-vis the bank
• One with a claim against him
• Holder of encumbered property

Wiktionary Word definitions in Wiktionary
n. (context legal English) One who has right of possession of goods but not right of property; the registered owner.