New Jersey Acts Saved from Repeal ACTS SAVED 54 § 6-5(6)

6. The purchaser of any tract of land shall immediately, upon the same being struck off to him, pay twenty per cent of the amount bid by him, and within ten days thereafter the remaining eighty per cent thereof, and the collector of taxes shall thereupon execute and deliver to him a certificate of sale, containing a covenant on the part of the town, township, borough or other municipality, in case the title of such lands shall prove to be invalid, and, upon surrender of the certificate, to refund the amount paid by him for such land, but without interest.