New Jersey Statutes Title 54. Taxation 54 § 5-62

No such fees or expenses incurred pursuant to R.S.54:5-61, shall be collectible, unless such redemption is made by payment to the collecting officer and unless the holder of the tax title shall have made and filed with such collecting officer affidavits showing the amount or amounts of such expenses actually disbursed or incurred, affidavits of service, including copies of the notices served, and certificates of the searches made in the form of an abstract of title covering a period of not less than twenty years.