Preparing a Vietnam Invitation Letter Ahead of Time Gives You Peace of Mind

Let's say your family in Vietnam is planning to come to Korea in October. You look into flights, pack your bags, and mentally you're already at the airport. But what actually ends up delaying things is often not the passport or the luggage — it's the documents.

Some people hear the word "invitation letter" for the first time at this point. They assume it's just a letter the inviting person writes, and then things get complicated once words like notarization and apostille come up.

So, does someone coming from Vietnam to Korea need a visa?

Yes. Generally, a Vietnamese national visiting Korea needs to apply for a visa that matches the purpose of the visit. There can be exceptions due to agreements or special circumstances, but for most people, the first step is confirming the right visa for their purpose.

So even when you're trying to invite family or an acquaintance to Korea, it isn't simply a matter of preparing an invitation letter and being done. You first need to check what visa the person actually coming to Korea is applying for.

It depends on which visa you're preparing for

In consultations these days, we see people preparing for C-3-4, and others looking into F-1 or F-3 depending on family relationship or purpose of stay. C-3-4 is a short-term business visa, F-1 is used for certain visit-and-cohabitation purposes of stay, and F-3 relates to accompanying family members of certain status holders.

That said, having the same visa type doesn't mean everyone prepares the exact same documents. Detailed requirements and submission documents can vary depending on the applicant's circumstances and the latest guidance from the diplomatic mission where they are applying.

There's one more thing to consider here. A visa doesn't get issued the moment you apply. Looking at the visa review period guidance from the Embassy of the Republic of Korea in Vietnam, review time varies depending on the visa type and application method. Processing time varies by the competent authority and your case; please confirm individually. Always check the mission's latest guidance before applying.

It can be risky to look only at this review period and think, "once the review is done, I can head straight to Korea." Time is also needed to prepare documents before the visa review, and if the inviting party in Korea has documents to prepare, that takes time too. If any authentication procedures are needed, that process needs to be factored in as well, and if documents need to reach an applicant overseas, so does that delivery time.

And this is exactly where the invitation letter comes in. While preparing a visa application, some people are told that the invitation letter or related documents need separate notarization or authentication. But this doesn't apply equally to every Vietnamese visa applicant. It depends on the visa type, the applicant's circumstances, the inviting party's circumstances, which Korean diplomatic mission the application is being submitted to, and the latest guidance as of the application date.

An invitation letter isn't required in every case. It depends on the visa type and the applicant's circumstances. So it's hard to say flatly that "this visa always requires an invitation letter" or "Vietnamese nationals always need an apostille." The more accurate statement is that for some visa types, individual circumstances, or requirements from the receiving institution, separate notarization or authentication may be needed, so it's best to check before applying.

What's the difference between notarization and apostille?

In consultations, quite a few people think these two are the same thing. To cut to the point — they're not.

Notarization is a procedure where a notary confirms that a document's signature or the facts stated in it are accurate. An apostille, on the other hand, is an international certification that allows a document already confirmed this way to be recognized as an official document abroad as well. In other words, think of notarization as coming first, and apostille as the next step after that.

Vietnam deposited its instrument of accession to the Apostille Convention on December 31, 2025, and the Convention entered into force for Vietnam on September 11, 2026 (HCCH status table). Documents can now be recognized with an apostille alone, but since practical handling standards may still change in the early period, we recommend checking once more with the diplomatic mission or with us at the time of your application.

Here's the key point, in the end: checking "what is needed as of this exact moment."

The problem isn't the documents. It's time.

Considering notarization, then apostille, then international shipping back to Vietnam, we recommend confirming the time each step takes in advance and leaving ample buffer. We often meet people who reach out just before their planned entry date, and at that point, we start to feel the time pressure too.

For example, say family in Vietnam is planning to come to Korea in early November. If you check the required documents in September or October, you'll know what's needed and can prepare step by step. But if you first check a week or ten days before entry, the story changes. Finding out at that point that additional invitation-letter-related procedures are needed, on top of visa review time, naturally creates pressure. (That said, we cannot guarantee that a visa will definitely be issued within any specific period.)

This is exactly why we suggest checking early. Checking while there's still plenty of time before the entry date lets you calmly figure out exactly which procedures are needed. Because the exact cost depends on document type and required procedures, we can't state a specific figure here, but we offer reasonable, lower-burden pricing so that cost doesn't stop people from starting the invitation-letter-related notarization or authentication process they need.

To summarize simply: Decide to invite → confirm purpose of visit → confirm visa type → check required documents at the diplomatic mission → check whether an invitation letter is needed → check whether notarization/apostille or other authentication is needed → prepare documents → apply for the visa in Vietnam. Work through it step by step in this order.

When it's hard to judge on your own

Even after reading this far, you may still be left wondering, "so what exactly do I need?" That's completely natural — the standards differ slightly depending on visa type, relationship, and diplomatic mission.

In summary: Vietnamese nationals generally need a visa matching the purpose of visit (there can be exceptions based on agreements or individual circumstances), and review time varies by visa type and by the mission, so please confirm it individually. It's important to remember that document preparation, authentication, and international shipping time must be added on top of this.

Whether a Korean invitation letter is needed varies by visa type and circumstances, but if it is needed, it's best to check well ahead of the planned entry date, factoring in review time, document preparation, and shipping time. Of course, it's also possible to prepare even when the entry date is close. Having more time is better, but even if you don't, please contact us and we will find the fastest possible way to help given your situation.

Overall, notarization, apostille and international shipping each add time that varies by the competent authority and shipping method, so we recommend starting well ahead of the planned entry date. Costs vary depending on the documents and procedures involved, so the most accurate figure comes from a consultation, but sorting out the whole process at once can often lower the overall burden.

One last thing

Inviting family involves feelings that come before any paperwork. We just hope those feelings don't have to become rushed because of the documents. If something isn't needed, you don't have to prepare it in advance. But we hope you can avoid finding out too late that something was needed.