When your Mom got the property from your Grandmother, did she go through Escrow/Title co., or was it just deeded over to her? It does make a differance. If she went through Title Co., they would be responsible for any liens they did not clear, as They have a duty to search for any liens and have them cleared before they will insure the Title. If your Mom just got it deed over to her, without going through escrow, then the lien, if it was recorded before your Mom took it over, then the lien stays with the property till paid.
Unni O. Shelton.