The right of redemption is purely a statutory proceeding, and the provisions of the statute relative thereto must be strictly complied with

There is no general right of redemption from judicial sales; but when such right exists, it is by statute, and the right extends only to cases coming within the statute,... and must be exercised in pursuance of the statute—otherwise it will be ineffective

Even if Zylstra had filed an affidavit under section 628.21, he could not have maintained a proceeding under that provision if the amount deposited with the clerk was insufficient to make redemption.

This was a special proceeding under section 628.21, The Code, and we have held several times that a ruling following a hearing under that statute (and its predecessor, section 11792) is appealable.

Under the plain language of this statute, "a deposit of the necessary amount to make redemption must be made with the clerk."

The court concluded Mummau's claims were moot because even if the court set aside the sheriff's sale, Mummau could not redeem the property because the statutory redemption period had passed.