N.J. Stat. § 2A:16-5: Interest of purchasers and mortgagees, etc., saved

No proceedings to be relieved of a final judgment shall, unless the judgment be void, in any wise affect the title of a purchaser or mortgagee for value, of any property derived under such judgment or process issued thereon or the right of any person who has acquired an interest therein for value depending upon any such judgment or process, or of their respective successors in interest.

L.1951 (1st SS), c.344.