noteholder
noun [ C ]
uk/ˈnəʊtˌhəʊldər/ us FINANCE, BANKING
a person, bank, or organization that has lent money, for example in the form of a mortgage or bonds:
The company could be placed in administration if the noteholders did not agree to the plan.
Some noteholders have discovered that the mortgagor is not even living there and is renting the home out to a friend or family member.