Traveling Abroad Without Both Parents? Notarize This First

A grandparent flying a grandchild to visit family overseas. A parent taking the kids on a trip while the other parent stays home working. Both trips can get held up at the same counter -- for the same missing piece of paper.

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Yes: U.S. Customs and Border Protection recommends that a child traveling internationally with only one parent, a grandparent, or another adult carry a notarized consent letter signed by the parent who isn't on the trip (source: USAGov, "International travel documents for children"). It isn't a federal law requiring notarization for every case, but airlines and foreign border agents treat it like one -- and some countries, including Mexico, make it an outright entry requirement rather than a suggestion (source: Delta Air Lines, International Child-Travel Regulations). The letter needs to be signed live in front of a notary, name the traveling adult and the exact trip dates, and match the child's passport exactly. We notarize and print it in one visit, no appointment needed.

We see this pattern every summer and again around the winter holidays: someone booked international flights weeks ago, packed the bags, and is walking out the door in a few hours -- and only then realizes the airline's check-in page is asking for a signed consent letter they don't have. The thing most people miss is that this isn't a form you fill out and hand over. It has to be signed in person, in front of a notary, the same way a will or a title transfer does. You can't pre-sign it at the kitchen table the night before and expect it to count.

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Why This Letter Exists (And Why It's Not Optional in Practice)

International child abduction is the reason this whole system exists. Border agents in the U.S. and abroad are watching for kids traveling without both legal parents present, because that's exactly the pattern an abduction or custody dispute looks like from the outside. A notarized letter is the paper trail that says, in effect, "the other parent knows about this trip and is fine with it."

The U.S. government's own guidance is direct about who needs one:

• If your child is traveling with one custodial parent, the letter should come from the other parent.
• If your child is traveling with a grandparent, other relative, or guardian -- or alone -- both parents should sign.
• The letter should say, close to word for word: "I acknowledge that my child is traveling outside the country with [name of the adult] with my permission."

That's the USAGov language directly (source: usa.gov). It's short on purpose. Border agents read a lot of these, and a clean, notarized, plainly-worded letter moves faster than a long one written like a legal brief.

No federal law forces every family to get this letter notarized before every trip. But airlines enforce it at check-in as a practical matter, and once you land, it's the destination country's rules that matter -- not U.S. rules. Mexico is the clearest example: non-Mexican citizens under 18 departing Mexico without both parents present are required to carry a notarized permission letter, and travelers have been turned away at the airport for showing up without one (source: Delta, Country-Specific Regulations). South Africa asks for a parental consent letter plus a certified birth certificate copy for a South African national minor. Rules like these change without much warning, so we always tell customers to check the destination country's current entry requirements before the trip, not just rely on what worked last time.

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What Actually Goes In the Letter

Keep it specific. A vague, undated letter is worse than no letter at all, because it looks like it was written to get past a form field rather than to actually authorize a trip. Include:

1. The child's full legal name, date of birth, and passport number -- matching the passport exactly, down to middle names.
2. The name of the adult the child is traveling with.
3. The exact travel dates and destination country (or countries, if there's a layover or multi-stop trip).
4. The signing parent's contact information, in case a border agent wants to call and confirm.
5. The sentence above -- "I acknowledge that my child is traveling outside the country with [name] with my permission" -- or close to it.
6. The signature, made live in front of the notary. Not beforehand.

We keep a printer right next to the notary desk for exactly this reason. Most customers come in with the letter drafted on their phone or in an email, and we print it, they sign it in front of us, we notarize it, and they're back in the car in under ten minutes.

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One Parent, Both Parents, or No Parents: Who Signs What

If custody is contested, informal, or still being finalized, don't guess. That's a conversation for a family law attorney, not something to sort out at a notary counter the morning of a flight.

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Where Families Usually Get Stuck -- and Why It Doesn't Have to Be a Scramble

Banks. Some bank branches still offer free notary to account holders, but availability has been shrinking for years, and most won't touch a document for a non-customer. Calling ahead to confirm is standard advice now, which tells you how reliable that option actually is.

Online notary services. Remote online notarization is legal in Washington and can work for plenty of documents. But a lot of international consent letters get scrutinized by border agents who expect a traditional wet-ink seal, and Mexico's requirements in particular are built around a physical notarization, not a video call. If there's any doubt, go in person.

UPS Store and similar chains. Notary availability varies franchise to franchise, and it's usually appointment-based. If your flight is in six hours, an appointment three days out doesn't help.

Printing the form somewhere else first. A lot of people draft the letter on their phone, then need to find a printer before they can even get to the notary step. That's two errands instead of one, and it's the exact bottleneck we built our counter to remove.

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How It Works at The Mail Station Monroe

No appointment. Walk in with:

• The unsigned consent letter (drafted, but not signed yet -- sign it in front of us).
• The child's passport, for the exact name and passport number match.
• A valid, government-issued photo ID for the signing parent.

We'll print the letter if you only have it as a phone photo or email draft, watch you sign it, notarize it on the spot, and hand it back. Washington caps notary fees at $10 per notarial act -- we charge within that limit, no membership and no per-page markup.

If the other parent lives somewhere else and needs to sign their own copy, we can ship the letter to them same-day and have it back before your trip if there's enough lead time. And if you want a scanned backup in case the original gets lost at security or on the plane, that takes about a minute while you're already standing at the counter.

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Frequently Asked Questions

Does the letter have to be notarized, or is a signed letter enough? Some airlines and countries will take a signed, unnotarized letter. Others -- Mexico is the clearest example -- specifically require notarization. Since you can't know in advance exactly which agent will ask to see it or how strict they'll be that day, get it notarized. It costs about the same either way and it never counts against you.

Can I notarize the letter after I've already signed it at home? No. A notary has to witness you signing, not confirm you signed earlier. If you've already signed it, we'll need a fresh printout with a blank signature line.

What if the other parent isn't available to come in and sign? The letter still needs that parent's live signature in front of a notary -- just not necessarily the same notary or the same day. We can ship the unsigned letter to wherever they are, they get it notarized locally, and it ships back to you.

Does a grandparent traveling alone with a grandchild need both parents to sign? Generally yes. Since neither legal parent is on the trip, both should sign separate consent letters (or one letter with both signatures, notarized together if they can come in at the same time).

How far in advance should we get this done? As soon as travel dates are locked in. Some countries want the letter dated close to the trip, not months in advance, so don't do it too early either -- a week or two out is usually the sweet spot.

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Before You Fly: Quick Checklist

• Confirm the destination country's specific requirements for minors traveling without both parents -- check the airline and the country's consulate page, since rules change.
• Draft the letter with the child's full legal name, date of birth, passport number, travel dates, destination, and the traveling adult's name.
• Do not sign it before you get to the notary.
• Bring the child's passport and the signing parent's valid photo ID.
• Get it notarized (and printed, if needed) in one stop.
• If the other parent is elsewhere, arrange for their signature and notarization with enough lead time to ship it back.
• Consider a scanned backup copy in case the original is lost in transit.

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Get It Notarized Today

The Mail Station Monroe

19916 Old Owen Road, Monroe, WA 98272 (360) 805-9250 Mon-Fri 9 AM-6 PM · Sat 9 AM-4 PM · 24/7 mailbox access First month free for new customers

Get in touch or just walk in -- bring the unsigned letter, the child's passport, and a valid photo ID.

Related Reading

Walk-In Notary in Monroe, WA: No Appointment Needed -- the full menu of documents we notarize beyond travel letters, from powers of attorney to vehicle titles.

Selling a Car in Monroe? Don't Pre-Sign the WA Title -- another document that has to be signed live in front of a notary, not beforehand.

Customs Forms Explained: CN22, CN23 & Commercial Invoice -- if you're shipping gifts or supplies ahead of an international trip, this covers the paperwork.

DHL or FedEx for International Shipping? A Real Price Test -- useful if you need to send documents or belongings to your destination before you land.

2025-26 US Tariffs: What They Mean for Your Packages -- background if your trip involves shipping anything internationally alongside the travel.

Printing Near Me in Monroe, WA: The Walk-In Print Counter -- for printing the consent letter, boarding passes, or any other travel paperwork before you head to the airport.

Going Through a Divorce or Separation in Washington? Protect Your Mail Address Now -- families navigating custody arrangements often need this letter and a mail-privacy plan at the same time.

Going Full-Time RV? Scan Your Documents First (Monroe, WA) -- if your family travels often, a scanned archive of ID documents and consent letters is worth having before any trip.

College-Bound: Why You Need a Permanent Address First -- another life stage where a notarized document and a stable address come up together.

Explore Services

• Notary Services
• Printing
• Document Scanning
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Written by the team at The Mail Station Monroe — serving Monroe, Sultan, Gold Bar, Snohomish, Duvall, Granite Falls, and the US-2 corridor since 1982.