1) at virtually every medical school, during the post-admissions/pre-matriculation after you have taken a final offer of acceptance, you must submit official transcripts from every school you have ever attended. Among other things, this is to verify prerequisite fulfillment.
2) In the MSAR some schools will list dates when prereqs must be completed by in order to start matriculation and that date is getting earlier and earlier
3) at virtually all schools if you can produce an official transcripts showing requirements have been met, you will likely be forced to defer. The schools would also have the right to rescind acceptance. I have had one advisee who completed a summer course requirement but the school didnt the official transcript in time so he was deferred. Similar thing happened with August graduate. Didnt have degree by matriculation so deferred.
4) As it is clearly says on the AMCAS instruction, any school you ever registered at for at least one course, must be reported and get a transcript, even if credits were transferred, no credit earned, or withdrew.
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