<p>As I have stated in my original post, it is possible to accept an offer from the UK even if you are accepted ED to Penn (although this is according to my school counselor, and not from Penn admissions) </p>
<p>If you are asking for your own purposes, yes, you can opt out of your ED contract with UPenn. How? Since Penn is committed to graduating its students debt-free, if a student receives a financial aid package that does not satisfy their needs, they can talk to their regional counselor and be released from their contract to consider other FA packages. I received my FA estimate yesterday, and received a very generous grant - let’s just say that I’m 100% committed to M&T now =)</p>