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Don’t Call It Legal Opinion. It’s an Affidavit of Foreign Law. This Is Something Else Entirely.

Don’t Call It Legal Opinion. It’s an Affidavit of Foreign Law. This Is Something Else Entirely.

18/02/2026 - 01:06
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When it comes to legal matters, clarity is everything. You and I both know that. But let’s face it, the law can be a maze of terms and concepts that sound similar but mean very different things. One of the most misunderstood terms I’ve come across is the “affidavit of foreign law.” People often confuse it with a legal opinion, but trust me, they’re not the same. 

Let’s break it down together and explore why this distinction matters, especially when dealing with inheritance, marriage, and other personal legal matters under Indonesian law.

What Is an Affidavit of Foreign Law?

An affidavit of foreign law is a sworn statement by an expert, usually a lawyer, explaining the Indonesian laws. Think of it as a guide for foreign courts or foreign legal authorities in foreign countries to understand how laws work in Indonesia. It’s not about giving advice or making judgments. It’s about explaining the rules as they are.

Now, a legal opinion, on the other hand, is more like advice. It’s what you’d get if you asked a lawyer, “What should I do in this situation?” A legal opinion interprets the law and applies it to a specific case. An affidavit of foreign law doesn’t do that. It’s purely descriptive, not prescriptive. It’s like the difference between reading a recipe and having a chef tell you how to cook a dish.

Why Does This Matter?

You might be wondering, “Why should I care about this distinction?” 

Well, let’s say you’re dealing with a cross-border inheritance case. Maybe your late uncle left you property in another country, and now you’re trying to figure out how to claim it. The court in the foreign country might need to understand the inheritance laws of Indonesia. That’s where an affidavit of foreign law comes in. It provides the foreign court with the information it needs to make a decision, without stepping into the territory of giving legal advice.

Inheritance and the Civil Code

Speaking of inheritance, let’s dive into how this works under Indonesian law. The Civil Code (Kitab Undang-Undang Hukum Perdata) lays out the rules for inheritance. Articles 830 to 1130 cover everything from who inherits what to how wills are executed. Here’s the key takeaway: inheritance is all about the transfer of rights and obligations from the deceased to their heirs.

Under Article 830, inheritance only takes place upon the death of the person whose estate is being inherited. This means that no one can claim anything until the person has passed away. Article 832 goes on to explain who the heirs are, prioritizing blood relatives and the surviving spouse. If there’s a will, the rules in Articles 875 to 913 come into play, detailing how the estate should be divided according to the deceased’s wishes.

Now, imagine you’re dealing with an inheritance case involving property in a foreign country. The foreign court might need an affidavit of foreign law to understand how inheritance works in Indonesia. Without it, the foreign court would be flying blind, and that’s not something you want when your family’s legacy is on the line.

Marriage and the 1974 Marriage Law

Let’s switch gears and talk about marriage. The 1974 Marriage Law (Undang-Undang Perkawinan No. 1 Tahun 1974) is the cornerstone of marital law in Indonesia. It governs everything from the requirements for a valid marriage to the division of property in case of divorce.

Under Article 2, a marriage is only considered valid if it’s conducted according to the laws of the couple’s religion and registered with the state. This dual requirement reflects Indonesia’s unique blend of religious and civil law. Article 35 addresses marital property, distinguishing between joint property (harta bersama) and separate property (harta bawaan). Joint property is owned equally by both spouses, while separate property remains with the individual.

Now, let’s say you’re in a mixed-nationality marriage, and you’re dealing with property issues in a divorce. The court might need to understand how marital property is treated under the laws in Indonesia. Again, this is where an affidavit of foreign law comes in. It provides the foreign court with the necessary context to make a fair decision.

Islamic Law and the Compilation of Islamic Law

For Muslims in Indonesia, the Compilation of Islamic Law (Kompilasi Hukum Islam) adds another layer of complexity. This set of rules, based on Islamic principles, governs matters like marriage, inheritance, and endowments (wakaf). It’s not a standalone law but a guideline for religious courts (Pengadilan Agama) in handling cases involving Muslims.

When it comes to inheritance, the Compilation of Islamic Law follows the principles of faraid, which allocate shares to heirs based on their relationship to the deceased. For example, under Article 176, a son gets twice the share of a daughter. This might seem unfair at first glance, but it’s rooted in the idea that men have greater financial responsibilities in Islamic tradition.

Now, imagine you’re dealing with an inheritance case involving assets in a country that doesn’t follow Islamic law. The religious court in a foreign country might need an affidavit of foreign law to understand how inheritance works in Indonesia. Without it, the court would struggle to reconcile the two legal systems.

The Importance of Getting It Right

You and I both know that legal matters are stressful enough without adding unnecessary complications. That’s why it’s so important to get the terminology right. Calling an affidavit of foreign law a legal opinion might not seem like a big deal, but it can lead to misunderstandings and even legal challenges. Courts rely on affidavits of foreign law to make informed decisions, and they need to trust that the information is accurate and unbiased.

So, the next time you hear someone use these terms interchangeably, feel free to set the record straight. An affidavit of foreign law is not a legal opinion. It’s a tool for understanding, not advising. And in a world where legal systems are becoming increasingly interconnected, that distinction is more important than ever.

Wrapping It Up

We’ve covered a lot of ground today, from the Civil Code’s rules on inheritance to the 1974 Marriage Law and the Compilation of Islamic Law. Along the way, we’ve seen how affidavits of foreign law play a crucial role in helping courts navigate complex cross-border cases.

The next time you find yourself dealing with a legal issue that spans multiple countries, remember this: an affidavit of foreign law is your ally. It’s not there to tell you what to do. It’s there to help the court understand the rules of the game. And when it comes to legal matters, understanding is half the battle.

My name is Asep Wijaya, writing for Wijaya & Co. We orchestrate to assist you navigate. Thank you for reading my posts.

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