Concern when transferring a title deed (4)

I believe the answer is:

lien

(Other definitions for lien that I've seen before include "Right to another's property, if an obligation is not discharged" , "Sequestration order" , "Legal claim on Nile" , "Security for a debt" , "The right to take property if an obligation is not discharged" .)

I've seen this clue in The New York Times.

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