projectrory
Anyone knows if a recommender can change his letter after it's submitted?
Once submitted, the recommender cannot change the her/his letter. You will have to exclude it. Again, once submitted, you will not be able to exclude the recommender. This option is only available till the recommendation is not submitted.
That said, you can always write to the Adcoms and get the recommendation excluded. You can then resend the link to your recommender. However, since the letter was submitted, a copy will remain with the Adcoms and they can always access it. That's to the best of my knowledge. Hope that helps