Customer Service

Major League Baseball Auctions Customer Service representatives are available to assist you Monday through Friday, 9 AM - 6 PM EST. All weekend or holiday Customer Service requests will be administered on the next business day.

Customer Service Form

Your opinion matters and we'd love to hear it! To submit your comments and suggestions, please complete and submit our Customer Service form below. Your suggestions are appreciated and are used to improve our site.

If your question is in regard the MLB authentication program or the hologram that appears on your item please e-mail authentication@website.mlb.com or visit the MLB Authentication Home Page.

All fields marked *are required.

* First Name
* Last Name
* E-mail Address
* Phone Number
Logon ID
Listing Number
Listing number can be found on the product detail page of each item. Click Here for more details.
* Category
* Message

Have a question? Check out our FAQ section.