Skip to content
ApostilleCheck

Guides

The concepts behind the process — so the tools and the state pages make sense.

What Is an Apostille? A Plain-English Guide →

An apostille is a standardized certificate that verifies a public official's signature and seal on a document for use in the 130 Hague Convention countries.

Apostille vs. Authentication: What's the Difference? →

An apostille is a one-step certificate for Hague member countries; authentication plus legalization is the multi-step chain for non-member countries.

The Hague Apostille Convention, Explained →

The 1961 Hague Apostille Convention lets a public document from one of its 130 member countries be accepted in any other member with a single certificate.

Apostille for Dual Citizenship: Which Documents →

Dual-citizenship applications usually need an apostilled birth certificate, marriage certificate, and FBI check. Learn the state vs federal split for each.

Apostille for Teaching Abroad (TEFL Guide) →

Teaching abroad usually needs an apostilled diploma and FBI background check. The diploma is a state job; the FBI check is federal. Run both at once.

Apostille Processing Times, State by State →

State apostille turnaround ranges from same-day counter service to 20 business days by mail. Federal FBI apostilles take 5+ weeks. Plan the whole chain.

County Clerk Pre-Certification, Explained →

In states like New York, a notarized document must be certified by the county clerk before the state will apostille it. Vital records skip this step.

Certified Copies: What Counts and What Gets Rejected →

A certified copy for an apostille must be an official copy from the issuing agency; hospital souvenir certificates and plain photocopies get rejected.