(1) If the creditor waives the mortgage, the owner acquires it.
(2) The waiver is to be declared to the Land Registry or to the owner and requires entry in the Land Register. The provisions of section 875 (2) and sections 876 and 878 apply accordingly.
(3) If the creditor waives the mortgage with regard to part of the claim, the owner has the rights set out in section 1145.