Maybe you sold a condo in Mérida and part of the price was left as a balance. Maybe you lent money to a local business partner in Mexico City, or a client never paid the last invoice for your services. Or maybe it is the other way around and a collection letter in Spanish just landed in your inbox. Before you react, it helps to know how collection actually works here.
Civil debt vs. commercial debt in Mexico
Mexican law sorts debts into two broad groups. A commercial (mercantil) debt usually comes from a business transaction: a sale between merchants, a supplier invoicing a company, or a signed negotiable instrument such as a pagaré (promissory note). A civil debt usually comes from a private relationship with no commercial purpose, like a personal loan to a friend.
Why does the label matter? It decides which law applies (the federal Commercial Code or the civil code of the relevant state), which court hears the case, what kind of lawsuit you can file and how long you have to file it. We regularly see claims filed down the wrong track that had to start over.
If you hold a pagaré
A pagaré signed in your favor is one of the strongest collection documents in the Mexican system. A properly completed note lets the creditor bring an executive commercial lawsuit (juicio ejecutivo mercantil). At the very start of that case, the court can order that the debtor be formally asked to pay and, if the debtor does not pay then and there, that assets be attached (embargo) to secure the debt.
There are two catches. The note has to meet the formal requirements set by law, and one with missing elements may lose that fast track. And the clock is running: the direct action on a pagaré becomes time-barred three years after its due date (article 165 of the General Law of Negotiable Instruments and Credit Operations). Some foreign creditors wait, hoping the debtor will eventually pay, and find out they waited too long.
No pagaré? You may still have a claim
You can sue based on a contract, invoices, bank transfers or other proof that the money is owed. Mexico has oral commercial trials (juicio oral mercantil), where certain cases are decided through hearings in a more direct way, as well as ordinary civil and commercial proceedings. Which one fits depends on the amount and the nature of the claim.
Personal loans are the hardest to collect, mostly because nobody wrote anything down. So keep whatever you have: the signed contract, receipts, transfer confirmations, and any email or chat where the other side admits the debt. Don’t delete those conversations, even if things have turned unpleasant. Mexican courts generally require Spanish translations of documents in other languages, so getting your evidence in order early saves time and money later.
Settle or sue?
Plenty of unpaid debts never need a courtroom. A formal demand letter in Spanish or a written payment plan can get money back faster and for less, and mediation is another option. Keep it lawful and respectful; threats or public shaming can become a legal problem for you.
A lawsuit makes sense when the debtor stops responding, the filing deadline is getting close, and there are assets in Mexico to collect from. That last point is easy to overlook: winning against someone with nothing in their name rarely puts money in your pocket. A debt collection lawyer in Mexico can help you weigh the amount, the strength of your evidence and the realistic chances of recovery before you spend on litigation.
Pursuing a claim from abroad
You don’t have to move to Mexico to collect. In many cases a foreign creditor can grant a power of attorney to local counsel and follow the case from home. Working with an English-speaking lawyer in Mexico City or a firm that offers legal consulting in Mérida means you get clear updates in English while the case runs in Spanish before the local courts.
What if you’re the one being collected?
If you are served with a lawsuit in Mexico, don’t ignore it, even if you live in another country. The deadlines to answer are short. And there may be real defenses: payments already made, a signature that isn’t yours, a pagaré filled in differently from what was agreed, or a claim that is already time-barred. The sooner someone looks at the papers, the more room you have.
Working with Grupo ASA
Grupo ASA is a bilingual firm with offices in Mexico City and Mérida, and we take collection matters for creditors and debtors alike. If you need a bilingual lawyer in Mexico to look at your situation, you can read more about our civil and commercial litigation practice or about working with us as your lawyer in Mérida.
This article provides general information about Mexican law as of October 2026. It is not legal advice for any specific situation and does not replace a review by a qualified attorney. Each matter must be analyzed based on its own documents and circumstances.