Short answer. No. Article 1244 protects the identity of what was promised. In an obligation to do or not to do, the person owed the work cannot be forced to accept a different act or service instead, even if it seems just as good. You may insist on the exact performance contracted for, or treat a swap as breach.
What the law says
In obligations to do or not to do, an act or forbearance cannot be substituted by another act or forbearance against the obligee's will.
Civil Code, Article 1244 — No Substitution of the Prestation. Read the full provision →
Identity of Payment
Philippine law does not let a debtor unilaterally change what is owed. Article 1244 states two related rules: for obligations to give a specific thing, the creditor cannot be compelled to accept a different item even if more valuable; for obligations to do or not to do, one act or forbearance cannot be substituted for another against the will of the person to whom the work is owed. The promise itself, not merely its rough equivalent in value, is what the law protects.
Why 'As Good' Isn't Good Enough
Value alone does not decide the question. A contractor who was hired to install a specific brand of tiles cannot unilaterally switch to a pricier alternative and expect acceptance, because the client bargained for particular materials, workmanship, or specifications, not simply for value received. Courts look at what was actually promised, since substituting performance changes the bargain even when no one loses money.
When Substitution Becomes Valid
The obligee's will is the deciding factor. If you expressly or impliedly agree to accept the different work, for instance by approving a change order or inspecting and accepting the substituted output without objection, the substitution becomes binding, effectively a new agreement on performance. Silence alone rarely counts as consent; a clear, voluntary acceptance is what the law looks for before treating the swap as valid.
If They Substitute Without Your Consent
You are not required to accept work that departs from what was agreed. You may reject the substituted performance and demand the original scope, withhold payment tied to acceptance, or treat the unauthorized substitution as non-performance and pursue remedies for breach, including damages for any resulting loss. Document your objection promptly, in writing if possible, so there is no basis later to claim you impliedly accepted the change by staying silent or letting work continue. Keep photographs, delivery receipts, and change-order paperwork, since these records show whether you accepted the substitution or merely tolerated ongoing work while sorting out the dispute. If the contractor persists despite your written objection, you may also explore rescission for material breach, depending on how central the substituted work was to the project. A calm, written note stating the agreed scope is usually enough to preserve your position.
Related provisions
- Civil Code, Article 1244 — No Substitution of the Prestation
- Civil Code, Article 1243 — Payment After Garnishment
- Civil Code, Article 1245 — Dation in Payment