An SDN member had contacted ERAS to try to clarify the question asked in this thread -- What happens when an applicant de-assigns a letter sent to a program before the program has downloaded the application? My understanding was that all letters assigned were sent, and that the deassigned letter would be marked as inactive. They had contacted ERAS, who told them that the letter would not be sent at all in this case.
Given the confusion, I contacted ERAS myself. I'd like to say I'm less confused now, although I'm not certain. When I explained the question to the ERAS help desk person, she told me that the letter would not be sent. When I explained to her that I was concerned that was not the correct answer and why, she put me on hold to talk to someone more superior, then return to tell me that I was correct and that the letter would be sent.
So, in the end, I think the situation is as such:
For LOR's only:
1) if you assign a letter to a program, when the letter is uploaded to your dean's office it will be sent.
2) if you de-assign a letter, the letter will be marked as inactive.
3) if you de-assign a letter before it is downloaded, the same is true. When the letter is downloaded, it will be marked as inactive and be visible to PD's
4) if you have assigned a letter to programs and it has not been uploaded, then I will not see it at all. I will not see that a letter is missing, nor whom it was supposed to be from. It will be as if it doesn't exist at all.
5) If you re-upload a letter into a slot that already exists and has a letter in it, it will overwrite the old letter and replace it. If I have a printout of it I could compare the two, if not I only have the new version.
For ALL other documents -- PS, MSPE, Transcript, Photo, etc
1) Any update / new assignment erases the old copy. If I have a printout I can compare, else I only have the new version. Any update like this is flagged for me -- I can ask for a report of all updated documents, especially for printing if needed.