You may substitute another qualified attendee in your registration at any time if you are unable to attend. Substitutions can only be made by contacting firstname.lastname@example.org. Please DO NOT cancel your current registration if you would like to make a substitution. Substitutions should be made before arriving at the conference, if at all possible, to avoid delays during busy registration times and potential issues with logging into the conference app and final certificates. Click here for additional information on refunds and cancellations.