Perkiomen Valley High School issued the following announcement on April 23
1. AP Students need to check the email address they used to create their account on myap.collegeboard.org; students should regularly check this email address for the most recent information about their AP Exams.
2. Students should verify their Collegeboard Account at myap.collegeboard.org by clicking their profile at the top right-hand corner of the page, and going to Account Settings. Students should scroll down to verify their information and confirm that their email address is the one to which they would like to receive the e-ticket to take their AP Exam. If it is not the correct email, they can update it to an email they check regularly by clicking UPDATE.
3. This email address will be used to get the e-ticket to take your AP exam(s).
Original source can be found here