Customer Service

Hours of Operation

8 a.m. to 5 p.m. central standard time, Monday through Friday

For specific matters, please try one of the e-mail addresses or phone numbers listed below.

Customer Service—The Chicago Manual of Style Online

For payment or credit issues concerning your Chicago Manual of Style Online subscription, or if you have changed e-mail addresses since subscribing, please e-mail us at cmoshelpdesk@press.uchicago.edu, or call 1-877-705-1878 (toll-free within the US and Canada) or 1-773-753-3347 (rest of world).

Customer Service—The Chicago Manual of Style, Print Editions

For delivery, payment, or credit issues concerning a book purchase, please e-mail us at custserv@press.uchicago.edu, or call 1-800-621-2736 (toll-free within the US and Canada) or 1-773-702-7000.

Report a Problem with This Site

For technical problems concerning The Chicago Manual of Style Online, please e-mail us at cmoshelpdesk@press.uchicago.edu (or use the form here), or call 1-877-705-1878 (toll-free within the US and Canada) or 1-773-753-3347 (rest of world).