Involuntary Lien

Judgment lien, lien for unpaid taxes or special assessment by a municipality that attaches to a real property without consent of the owner, in contrast with a Mortgage lien, which is voluntary.

A Lien imposed against property without consent of the owner (unpaid taxes, special assessments, etc.). Compare Mortgage Lien.
Example: The Absentee land Owner was not notified of the past-due tax bill. The tax Assessor placed a lien on the property that was an involuntary lien, since the owner did not take action to cause the lien.