Does anyone know how long it is taking to get an authentication letter nowadays? In the past I have gotten my letters in 2-3 weeks. Now, I have sent in my request 5 weeks ago and they cashed my check within 1 week. Don't know if they have a big backlog, or possibly my letter got lost in the mail. If they do have a backlog on gathering information, there certainly is no backlog in the check cashing department.