July

46th Annual National Sports Collectors Convention - Booth #2404 & 2505

Date: July 29th - August 2nd, 2026

Wednesday 4pm-8pm - Thursday 10am-6pm - Friday 10am-6pm - Saturday 10am-6pm - Sunday 10am-4pm

Location: Chicago Rosemont Convention Center - 5555 N River Rd, Rosemont, IL 60018

Primary Certifications

This service is used for most items valued under $300 and includes a 2 ½” x 2 ½” certification card with a matching tamper proof sticker on your item
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Item Submission

Have items to submit to CAS for authentication? You can ship your items to us, visit our office, catch us at a show, and we even make house calls!
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One-Step Verification

You authenticated item will have a unique alphanumeric sticker that matches your certificate. Click below to verify your item with our database...
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"Over the past 5 yrs using Mike Root as an authenticator I found him to be 100 percent Honest, fair and accurate with his services.
He has always been very responsive and price-conscious to my needs
as a customer.
Thank you Mike for coming back!"
Jack Probstein

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"We have known Mike for many years and relied on his expertise & integrity in authenticating autographs of both vintage and current day athletes as well as celebrities. We have used LOA's and COA's provided by Mr. Root in our auctions & sales and have never had a problem with his work."
Lou & John
Inside the Park Collectibles
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