Civil Code Article 875-4

If a mortgage is created on multiple real properties for the purpose of securing the same claim, if individual mortgaged properties are sold by auction separately, the following provisions apply:1. When a mortgaged property sold by auction is owned by a third party other than the debtor and the amount of satisfaction received on the claim by the mortgagee from the auction proceeds exceeds the amount apportionable from that property, the owner of the mortgaged property, within the extent of that excess amount, may demand reimbursement from any other third party or parties whose properties provided as security for the mortgage have not been auctioned, and may also succeed to the rights of the mortgagee in the mortgaged property of such other third parties, to the extent of their apportionment, unless such succession would be prejudicial to the rights of the mortgagee.2. When a mortgaged property sold by auction is owned by a given person and the amount of the mortgagee's claim satisfied out of the proceeds from auctioning that property exceeds the amount apportionable from that property, then a mortgagee with a junior mortgage on that same property, within the extent of that excess amount, succeeds to the rights of the enforcing mortgagee in any remaining mortgaged properties provided as security by the same given person that have not yet been auctioned, unless such succession would be prejudicial to the rights of the mortgagee.