Have you ever been surprised by a rule you didn’t know about, like being stopped for a traffic violation you weren’t aware of, fined for not wearing the right safety gear, or told at a government office that you forgot a requirement you didn’t even know existed? Most of us react by saying, “I didn’t know!” But in the eyes of the law, that excuse doesn’t work. The legal maxim ignorantia juris non excusat, which means “ignorance of the law excuses no one from compliance therewith”, captures this principle. This is expressly laid down in Article 3 of the Civil Code of the Philippines1, which provides that once a law has been published and has taken effect, every person is bound to follow it, whether or not they actually knew about it.
Why Is This the Rule?
Imagine if people could always say, “Sorry, I didn’t know that was illegal.”
- Thieves could claim they didn’t know stealing was against the law.
- Drivers could say they didn’t know drunk driving was illegal.
- People could refuse to pay taxes by saying they weren’t aware of tax laws.
If ignorance were an excuse, no law would ever be followed. Society would be chaotic. That’s why once a law is officially published, everyone is presumed to know it. It’s like an “automatic announcement” to the public, even if you didn’t personally read it in the newspaper or online.
The law works in a similar way. Publication is like that bulletin board, once the rule is out there, everyone is expected to know.
In Engr. Ruben Yu v. Heirs of Sia (2022)2, the Supreme Court dismissed both the complaint and counterclaim after holding that the contractor and the building owners were equally at fault for constructing a hotel in violation of the National Building Code, applying Article 3 of the Civil Code which provides that ignorance of the law excuses no one from compliance therewith.
What if there is a new law?
When a new law is passed in the Philippines, it doesn’t immediately take effect. Under Article 2 of the Civil Code, the law must first be published, either in the Official Gazette or a newspaper of general circulation.
Once it’s published, the law usually takes effect 15 days after publication (unless the law itself says otherwise). From that moment, everyone is presumed to know the law, even if they never opened a copy of the Gazette or read the newspaper.
What It Means for Us?
- Stay informed. We don’t need to memorize all laws, but being aware of basic rules (traffic, taxes, contracts, family law) helps us avoid trouble.
- Ignorance won’t save us. Even if you didn’t know about a penalty or requirement, you’re still responsible.
- It promotes fairness. If one person could escape liability by claiming ignorance while another person is punished, that would be unfair.
Laws may sometimes feel complicated and overwhelming, but Article 3 of the Civil Code3 gives us a straightforward reminder: ignorance is never an excuse. Whether it’s traffic rules, tax obligations, or everyday legal duties, being unaware does not shield us from the consequences of our actions. Just like in life, what we don’t know can still hurt us, and that’s why it’s always better to stay informed, ask questions, and know our rights and responsibilities under the law.
References:
- Civil Code of the Philippines, Republic Act No. 386, art. 3 (1949). ↩︎
- Engr. Ruben Y. Yu, v. Heirs of Manuel Sia, represented by Mayor Rosemarie H. Sia, G.R. No. 248495, 2023. ↩︎
- Civil Code of the Philippines, Republic Act No. 386, art. 3 (1949). ↩︎
