Applying through TMDSAS this cycle and had planned to have 4 letters of recommendation. Notified all my letters writers weeks ahead of time. 3 of the 4 got theirs into Interfolio early, one didn’t submit until it was pretty late and didn’t sign it, no letterhead, etc. So I had to contact the letter writer and go over the requirements with them multiple times. He finally submits it with Interfolio checking it and saying it looks good. Now TMDSAS has rejected it because he didn’t date the letter. I genuinely believe it will be a very strong letter, he just seems to have difficulty following the instructions on writing it. I am grateful for the letter, but should I just cancel the letter with TMDSAS, rather than wait weeks for him to finally send it again and then have it processed by TMDSAS? This letter is basically the only thing holding up some of my secondaries from being complete at this point.
Any advice is infinitely appreciated.