When I clicked on a link to check my application information, I saw a message saying:
Congratulations! We are pleased to offer you admission to the University of Washington for autumn quarter 2015. A formal letter of admission has been mailed to you and a packet of additional information is mailed within a few days of the letter. Please allow sufficient time for the mail to reach you, especially if you live outside of Washington state. If you have already received your packet, you may choose to confirm or decline your enrollment to the UW Seattle online. The deadline to confirm your enrollment is May 1, 2015.
If you got this message, there is not a single doubt you have been accepted!
I got that exact same message. The link opens to a page where I can accept or decline the admission. Btw, I’m an international and student and I have not yet got the email.