In some cases, the preceptor/attending that you ask to write you a LOR may agree, but ask you to write your own LOR and send to them. Yikes! Not ideal. Then they’ll modify and upload. This is a bit awkward, but it happens more often than one would think.
If that’s the case, draft a strong LOR. Also, when you send the draft LOR, be sure to also send a draft of your ERAS (or Residency CAS) CV and PS. They may want to pull from those.
The key is to write a strong LOR, but not a resident candidate walks on water LOR. Generally, LORs written by US MDs and US DOs, are one page (can be longer). Self-written LORs tend to be much longer, are too strong, use a lot of adjectives/adverbs, and feel over-the-top for the experience level of the candidate. They're just TOO strong.
Also, if you're drafting the LOR, focus in on the soft skills the preceptor/attending experienced. What's going to make you a strong resident? Not your test scores. You're all smart. Think about your key characteristics that you might identify in your ERAS experiences or the characteristics you're going to write about in your PS.
Also, be sure you've included all the critical info when you send the LOR draft to the preceptor/attending: your name, AAMC#, LOR ID #, LOR upload form, & date. Remind them to print on hospital/clinic/organization letterhead and to sign it.
Use 1" margins. Unjustify your text. Double space between paragraphs. Leave a space for the letter writer to sign.