Chapter 5. Collateral Mortgages and Vendor's Privileges: Effective Date of Collateral Mortgages, Relationship of Collateral Mortgages to Chapter 9 of the Louisiana Commercial Laws and Defenses to Enforcement LA REV STAT Tit. 9, § 5550. Definitions LA REV STAT Tit. 9, § 5551. Effective date of a collateral mortgage LA REV STAT Tit. 9, § 5552. Defenses to enforcement of a collateral mortgage LA REV STAT Tit. 9, § 5553. Defenses to enforcement of a vendor's privilege LA REV STAT Tit. 9, § 5554. No requirement of registry of transfer, assignment, pledge, or security interest in or of the written obligation, collateral mortgage, or vendor's privilege LA REV STAT Tit. 9, § 5555. Executory process in the case of notes or other obligations not paraphed for identification with the mortgage LA REV STAT Tit. 9, § 5557. Obligation to grant release of mortgage