661. Necessary parties to redemption proceedings.

All persons entitled to redeem1, and all persons entitled to any part of the security or debt, are necessary parties to redemption proceedings2, but the court will not stop redemption on account of the absence of a party who cannot be found if the mortgagee runs no risk3, and it can protect the rights of the absent party by preserving them in the judgment4. The rule requiring the presence of all parties is based on the mortgagee's right to account once for all, which can only be done if the account is taken in the presence of all parties