Apostille Pro USA
Get GuideStatesExpeditedToolsAboutGet Started
Apostille DIY

Apostille Pro USA is an independent, authoritative publisher of document authentication guides. We specialize in step-by-step DIY resources for securing Secretary of State apostilles and federal US Department of State legalizations under Hague Convention standards.

Secure SSL Encryption
100% Hague Compliant

State Guides

  • California Apostille Guide
  • New York Apostille Guide
  • Texas Apostille Guide
  • Florida Apostille Guide
  • Illinois Apostille Guide
  • New Jersey Apostille Guide
  • View All 50 States →

Expedited Services

  • California Expedited
  • New York Expedited
  • Texas Expedited
  • Florida Expedited
  • Illinois Expedited
  • All Expedited Options →

Document Guides

  • Birth Certificate Apostille
  • Marriage Certificate Apostille
  • Death Certificate Apostille
  • Diploma & Transcripts
  • FBI Background Check
  • Power of Attorney Apostille
  • View All Documents →

Tools & Authorship

  • Editorial Board
  • Amelia Rivera, Senior Editor
  • James Thompson, Legal Affairs
  • Sarah Chen, Verification Lead
  • Calculators & Help
  • Apostille Fee Calculator
  • Apostille Serial Validator
  • Help & FAQs
support@apostilleprousa.com|San Francisco, CA • Austin, TX • New York, NY

© 2026 Apostille Pro USA. Apostille Pro USA is an independent publisher of notary, document legalization, and apostille guidebooks. We are not a government agency, Secretary of State office, or embassy.

About Us•Contact•Privacy Policy•Terms of Service
IL
Illinois

Illinois Apostille Service

Step-by-step guides for every document type. Current fees, forms, and official addresses.

State Fee

$2

Processing Time

7–14 business days

State Office

Springfield (217) 782-7017; Chicago (312) 814-8218

Available Documents

Select your document type to view the complete Illinois apostille guide

Birth Certificate

Complete guide with fees, forms, and mailing instructions for Illinois

Death Certificate

Complete guide with fees, forms, and mailing instructions for Illinois

Educational Diploma

Complete guide with fees, forms, and mailing instructions for Illinois

Single Status Affidavit

Complete guide with fees, forms, and mailing instructions for Illinois

Marriage Certificate

Complete guide with fees, forms, and mailing instructions for Illinois

FBI / Background Check

Complete guide with fees, forms, and mailing instructions for Illinois

Power of Attorney

Complete guide with fees, forms, and mailing instructions for Illinois

Before You Start

  • • Choose your document above to see exact Illinois requirements
  • • All guides include current fees, forms, and official mailing addresses
  • • Verify your document is certified before requesting an apostille

Illinois-Specific Notes:

  • • Documents must be original certified copies from Illinois IDPH or County Clerk
  • • Photocopies and hospital records are not accepted
  • • Walk-in service available at Springfield office
Contact Information
Official Illinois apostille office

Mailing Address

Illinois Secretary of State, Index Department, 111 E. Monroe Street
Springfield, IL 62756

Phone

Springfield (217) 782-7017; Chicago (312) 814-8218

Email

eAuthenticationsSpringfield@ilsos.gov; eAuthenticationsChicago@ilsos.gov

Hours

Mon–Fri 8:00 AM–4:30 PM

Visit Official Website