Short answer. No. Article 2131 expressly defers to the Mortgage Law and the Land Registration Law for a mortgage's form, extent, and consequences beyond what the Civil Code chapter covers. In practice, actual registration, annotation, and foreclosure procedure run mostly on those special laws and the Rules of Court, not on the Civil Code alone.
What the law says
The form, extent and consequences of a mortgage, both as to its constitution, modification and extinguishment, and as to other matters not included in this Chapter, shall be governed by the provisions of the Mortgage Law and of the Land Registration Law.
Civil Code, Article 2131 — Governing Laws. Read the full provision →
The Civil Code sets the basic contract rules
Articles 2085 through 2130 give the substantive framework for a mortgage as a contract: what makes it valid, what property can be mortgaged, how indivisibility works, and what the mortgage attaches to. That framework answers whether a mortgage exists and what it covers.
Article 2131 then signals that the Civil Code deliberately stops short of covering the mechanics of putting that contract into the public record or enforcing it through foreclosure.
Where the procedural rules actually live
Registering a real estate mortgage so it binds third persons, annotating it on the certificate of title, and cancelling that annotation once the debt is paid are matters governed by land registration law, not by the Civil Code chapter on pledge and mortgage.
Foreclosure itself, whether done judicially or extrajudicially, follows its own special legislation and the Rules of Court on foreclosure of mortgages, which set out notice, publication, auction, and redemption requirements that the Civil Code does not spell out.
Why the split matters in practice
A borrower or lender who only reads Articles 2085 to 2130 will understand the substance of the mortgage but not the paperwork or the foreclosure timeline, because those live in the special laws Article 2131 points to.
Anyone trying to register, modify, or foreclose a mortgage needs to consult those separate statutes and procedural rules alongside the Civil Code, since the Code itself does not attempt to duplicate them.
What still comes from the Civil Code
Despite deferring on form and procedure, the Civil Code still controls core questions like whether the mortgage is valid, what it secures, and how it behaves when the debt is divided or the property changes hands, since those are matters the chapter itself covers.
So a mortgage dispute typically draws on both bodies of law together: the Civil Code for the substance of the security, and the Mortgage Law, Land Registration Law, and Rules of Court for how it is recorded and enforced.