When do they ask applicants for transcripts?

UW doesn’t want a transcript with the application but say they may ask for it later. Do they only ask people they want to admit? If so, can anyone tell me when they do that?

My son received an email last night requesting transcript. I would like to know too if UW asks all applicants for this?

There is some “spot checking” during reading season, but mostly they ask for transcripts after you accept an admission offer to confirm your application was truthful and that you graduated high school.