Every holiday season, thousands of Houston kids spend Christmas and New Year’s with grandparents, tíos and cousins in Mexico. Many of them fly back with an aunt, a grandparent or a family friend instead of their parents. That is exactly when Mexican immigration can stop a child at the airport or the border if the right permission paperwork is missing.
This guide explains when Mexico asks for a parental consent letter, why a letter signed here in Houston usually needs to be notarized, apostilled and translated into Spanish, and how to get all three done in one visit before your trip.
Short on time? Bring your unsigned letter and photo IDs to our office at 6124 Hwy 6 N, or request a mobile visit. We notarize, get the Texas apostille, and arrange the certified Spanish translation. Call 832-530-3652.
Quick Answer
- When Mexico requires it: when a minor who is a Mexican national (including many dual U.S.–Mexican citizen kids) or a Mexican resident leaves Mexico alone or with an adult who is not a parent or legal guardian.
- When it is not required by Mexico: when the child travels with one or both parents, or as a foreign tourist on a U.S. passport.
- Two ways to give permission: Mexico’s SAM form (done in person at an INM office in Mexico) or a notarized letter from the parents.
- If the parents sign in Houston: the letter is a foreign document in Mexico, so it needs a notary, an apostille and a Spanish translation.
When Does Mexico Require a Permission Letter for a Minor?
Mexico’s rule is about children leaving Mexico without their parents. According to the Mexican Embassy, minors under 18 who are Mexican nationals, or foreigners with temporary or permanent residence in Mexico, must show parental permission when they travel abroad alone or with an adult who is not their parent or guardian. Children traveling with at least one parent or legal guardian do not need this authorization, and foreign minors visiting as tourists are exempt.
Mexico’s Interior Ministry (SEGOB) repeated the same point in December 2025: the permission format is not needed when a child travels with one or both parents or with the person who holds legal custody.
For Houston families, the common situations that trigger the rule are:
- Your child spent the holidays in Mexico and is flying back to Houston with a grandparent, aunt, uncle or family friend.
- Your child is flying back alone as an airline unaccompanied minor.
- Your child is returning on a school, church or sports trip with chaperones.
Dual citizens, take note: many children born in Houston are also registered as Mexican nationals. If your child travels on a Mexican passport or is identified as Mexican, plan on carrying the permission document even if they also hold a U.S. passport.
Option 1: The SAM Form vs. Option 2: A Notarized Letter
Mexico accepts two kinds of permission:
- The SAM form (Formato de Salida de Menores): free, filled out online, then validated in person at a National Migration Institute (INM) office. It is valid for six months and only one trip, and each child needs a separate form. Because it requires in-person validation in Mexico, it is hard to use when the parents are in Houston and the child is already in Mexico.
- A notarized letter from the parents: the practical choice for Houston parents. It can be signed here before your child ever leaves, travel with the child, and be shown at the airport or border.
Why a Houston Letter Needs Three Steps: Notary, Apostille, Translation
A letter signed in Texas is a U.S. document. For Mexican authorities to accept it, it generally needs:
- Notarization. Both parents (or the legal guardian) sign in front of a Texas notary with valid photo ID. We offer this in our office or with a mobile notary visit.
- A Texas apostille. Mexico has been part of the Hague Apostille Convention since 1995, so a Texas apostille from the Secretary of State replaces consulate legalization. See our apostille for Mexico page for how it works.
- A Spanish translation. Mexican offices ask for documents in Spanish. Many families sign a bilingual English–Spanish letter, and we can arrange a certified Spanish translation of the letter and the apostille when needed.
Bring the original plus at least two copies on the trip. Each child should have their own letter or be clearly named in it.
What the Letter Should Include
We do not write legal documents, but Mexican authorities expect a permission letter to clearly state:
- Full names of both parents or the legal guardian, with ID or passport numbers
- Child’s full name, date of birth and passport number
- Full name and passport number of the adult traveling with the child (or a note that the child travels alone)
- Destination, travel dates, and mode of transportation (airline and flight number if known)
- A clear statement that the parents authorize the trip
- Phone numbers where the parents can be reached during the trip
The Mexican Embassy specifically lists the mode of transportation, destination and travel date as required details, so do not leave those out.
Even When It Is Not Required: Airlines and the U.S. Border
If your child travels with only one parent, Mexico does not require a letter. But airline agents and U.S. border officers may still ask whether the other parent agrees to the trip, especially when last names differ. A notarized consent letter from the parent who is not traveling is the simplest way to avoid questions. It is a small cost compared with a missed flight.
Timeline: Start 2–3 Weeks Before Your Trip
The notary step takes minutes. The apostille is what takes time, because Texas issues it from the Secretary of State in Austin. Standard processing can take a couple of weeks, so for Christmas travel, start as early in December as you can. If your trip is close, ask about our expedited apostille option.
Cost in Houston
| Step | Houston Fingerprint price |
|---|---|
| Office notarization | $10 |
| Mobile notary visit | $50 |
| Texas apostille (per document) | $155 |
| Expedited apostille | $299 |
| Certified Spanish translation | Quote by page |
See our full pricing page and confirm your total when you book.
Common Mistakes That Get Kids Stopped
- Only one parent signs when the child is traveling with a third party. Mexico expects permission from both parents or the legal guardian.
- Signing before the notary appointment. The notary must watch you sign.
- Dates or names that don’t match the passport or ticket. Check spellings, especially double last names.
- Skipping the apostille. A notarized letter alone is a U.S. document; without the apostille it may be refused.
- Bringing only one copy. Carry the original and copies.
- Reusing an old letter. Write a new letter for each trip with the correct dates.
Frequently Asked Questions
Does my U.S.-citizen child need a consent letter to leave Mexico?
Mexico exempts foreign minors visiting as tourists. But if your child is also a Mexican national, or lives in Mexico, the rule applies. Many Houston families carry the letter anyway because airlines can ask for it.
I’m traveling with my child. Do I need a letter from the other parent?
Mexico does not require it when a child travels with one parent. A notarized letter from the other parent can still help with airlines and U.S. border questions.
Can I do the SAM form from Houston?
You can start it online, but it must be validated in person at an INM office in Mexico. That is why parents in Houston usually use a notarized, apostilled letter instead.
How long does the whole process take?
Notarization is same-day. The Texas apostille is the slow part, usually one to several weeks depending on the service level. Translation is usually a few business days.
Can you write the letter for me?
No. We are notaries and document specialists, not attorneys, and we do not give legal or immigration advice. Write the letter yourself or with your attorney, then bring it unsigned to your appointment. If there is a custody dispute or court order, talk to a family law attorney first.
Get It Done in One Visit
Houston Fingerprint handles the notarization, the Texas apostille and the certified Spanish translation, and our staff speaks Spanish. Book online, request a mobile visit, or call 832-530-3652.
Rules can change. Before you travel, confirm current requirements with your airline and the Consulate General of Mexico in Houston. This article is general information, not legal advice.
Related Services and Guides
- Apostille for Mexico from Houston
- Certified Spanish translation in Houston
- Notary service in Houston
- FBI background check for a Mexico visa