667. When offer to redeem unnecessary.

667.     When offer to redeem unnecessary.

Every claim against a mortgagee by the owner of the equity of redemption1 who admits the mortgage must expressly or by implication contain an offer to redeem2, except where a person entitled to redeem3 asks for a sale of the mortgaged property instead of redemption4, or where the question raised is one merely of construction arising under the mortgage deed5, or where the mortgagee has become a party to trusts affecting the equity of redemption, in which case any person interested in those trusts may