We would be honored to have you as a speaker and would be grateful for the opportunity to share highlights of our research program with you. The Invitation Letter specifies the details of the visitor's activities at George Mason University, and indicates the expected duration of the visit.You can download an invitation letter from a link in your acceptance notification email. If you are NOT PRESENTING, you MUST REGISTER for the meeting first. Use this form to request a visa invitation letter for your participation in an SPE event. Please complete all requested fields. The PAA Board of Directors has instituted a two-presentations rule, ie, each person is limited to a maximum of two presentations. I invite you to join us and participate in our program, which will be held (exact date, time, location). Use this form to request a visa invitation letter for your participation in an SPE event. Please complete all requested fields.