Notarization, authentication, and apostille are three different steps, not synonyms. Notarization is a Colorado notary verifying a signer’s identity. An apostille is a Secretary of State certificate that makes a notarized document valid in Hague Convention countries. Authentication is the equivalent step for non-Hague countries, followed by embassy legalization. Which one you need depends entirely on the destination country.
“Is an apostille the same as having something notarized?” It is one of the most common questions people ask when a foreign government, employer, or university tells them their document needs to be “authenticated” or “apostilled.” The terms get used loosely and interchangeably, which makes an already confusing process worse. They are not the same thing — and using the wrong one means your document gets rejected.
This guide untangles the three terms, shows how they relate, and helps you figure out exactly which you need. For the full process of obtaining one, see our complete guide to apostille services in Colorado.
What Notarization Is
Notarization is the foundational step. A Colorado notary public verifies the identity of the person signing a document, confirms they are signing willingly, and witnesses the signature. The notary then applies their stamp and signature. Notarization says nothing about whether the document is true or valid abroad — it only certifies that the signing happened properly, in front of an authorized official.
For domestic use, notarization is often the end of the road. A notarized power of attorney or affidavit is ready to use within the United States. It is only when a document needs to cross a border that the next steps come into play.
What an Apostille Is
An apostille is a certificate issued by the Colorado Secretary of State that authenticates a notarized or government-issued document for use in another country — specifically, a country that belongs to the Hague Apostille Convention. The apostille does not re-examine your document. Instead, it verifies that the notary who signed it was genuinely commissioned and authorized in Colorado. It is a government vouching for the official who handled your document.
An apostille is recognized automatically by every other Hague Convention member, which is the whole point of the treaty: one certificate replaces what used to be a long chain of approvals. More than 120 countries are members, including most of Europe, Mexico, Japan, and Australia.
What Authentication (and Legalization) Is
Authentication is what you need when your destination country is not a Hague Convention member. The Colorado Secretary of State issues an authentication certificate rather than an apostille. But unlike an apostille, authentication is not the final step — the document must then be legalized by the destination country’s embassy or consulate before it will be accepted. This is the longer path, often called “embassy legalization.”
In other words: apostille and authentication are parallel steps that do the same job at the state level. The difference is what happens next. An apostille is complete on its own; an authentication is followed by consulate legalization.
Side-by-Side Comparison
| Notarization | Apostille | Authentication | |
|---|---|---|---|
| Who issues it | Colorado notary | Secretary of State | Secretary of State |
| What it confirms | Signer’s identity | Notary’s authority | Notary’s authority |
| Used for | Domestic + first step abroad | Hague countries | Non-Hague countries |
| Final step? | For domestic use | Yes | No — embassy next |
“An authentication or legalization, sometimes called an apostille, is needed for documents that you plan to use in a foreign country.”
Which One Do You Need?
The answer comes down to one question: where will the document be used? If it is staying in the United States, notarization alone is usually enough. If it is going abroad, you need notarization plus either an apostille or an authentication — and the destination country decides which. Check whether that country is a Hague Convention member: if it is, you need an apostille; if it is not, you need authentication followed by embassy legalization.
Not Sure Which You Need? We Can Tell You
If a foreign office has asked for an “apostille” or “authentication” and you are not sure which applies, MJ Notary Denver can confirm it based on your destination country and handle whichever path you need — notarization, apostille, or full authentication and legalization. As a Colorado notary and member of the National Notary Association, we manage the entire process from start to finish.
We serve Denver and the surrounding metro area — including Aurora, Lakewood, Centennial, Littleton, Englewood, and Commerce City — and coordinate statewide. Contact MJ Notary Denver or call (720) 333-0580.
Frequently Asked Questions
Is an apostille the same as a notarization?
No. Notarization is a Colorado notary verifying a signer’s identity and witnessing a signature. An apostille is a separate certificate from the Secretary of State that authenticates the notary’s authority so the document is valid abroad. Notarization comes first; the apostille is added afterward for international use.
What is the difference between an apostille and authentication?
Both are issued by the Secretary of State and verify the notary’s authority. An apostille is used for countries in the Hague Convention and is the final step. Authentication is used for non-Hague countries and must be followed by legalization at that country’s embassy or consulate.
Do I need an apostille if my document is only used in the US?
No. Apostilles and authentications are only for documents used in foreign countries. For domestic use within the United States, notarization is typically all that is required.
How do I know if my destination country needs an apostille or authentication?
Check whether the country is a member of the Hague Apostille Convention. Members accept an apostille; non-members require authentication plus embassy legalization. MJ Notary Denver can confirm your country’s status and handle the correct path for you.
Does a document need to be notarized before getting an apostille?
Most documents must be notarized first, since the apostille verifies the notary’s authority. The exception is vital records like birth certificates, which instead need a certified copy from Vital Records. The Secretary of State will not apostille an un-notarized or uncertified document.
Written by
MJ Notary Denver
MJ Notary Denver is a certified Colorado notary public and member of the National Notary Association, providing mobile notary, apostille, online notarization, and loan signing services throughout the Denver metro area since 2019. Commission #20194021878.