VISA Invitation Letters are issued to the Conference Authors, Conference Listeners, Conference Speakers, and Poster Presenters only if you require a personal letter of invitation to attend the conference to ensure that you request the same during your registration. Before registering to ensure that you have your scanned passport copy suitable for uploading. The Conference Committee cannot contact or intervene with any Embassy or Consulate office abroad on your behalf so please begin your visa application process as soon as you determine that you want to attend the Stem Conferences. Please provide as much information as possible to avoid delays in receiving your letter. You must register for the conference and have paid the invoice before such letters are issued.