You may send or receive faxes from the FedEx Kinko's chain inside the Mallinckrodt Campus Bookstore on the Danforth campus (for a fee, of course!). Call (314) 862-2173 for more information.
WashU students: if what you need to fax is career-related, the Center for Career Engagement in the Danforth University Center (DUC) will fax it for free.
Other Resources:
For scanning and emailing, a good alternative to faxing, see the Libraries Printing page.