Deadline: July 16, 2020
Written request of registration cancellation must be emailed to the ESA Registrar.
For questions regarding registration/cancellation, please email the ESA Registrar or call (202) 833-8773 x219.
Deadline: June 4, 2020
Presenters should cancel in writing by emailing Jennifer Riem. Please include the abstract ID so that we can make sure we note the correct presentation. 
If you are not sure what the abstract ID is, check any recent email regarding your presentation, which should include it. As a courtesy we ask that any presenters with uncertainty regarding their presentation to cancel by June 4 if at all possible.
A replacement speaker is allowed (and encouraged) if a speaker’s plans change unexpectedly after June 4. In such cases the presenting author should attempt to find another person to make the presentation on their behalf. A coauthor is ideal, but the substitute speaker does not necessarily need to be a coauthor.