1) AMCAS letters are processed fully independently from Primary Application
2) Letter are not, repeat. not required for application verification or transmission
3) Letters are transmitted separately from primary application and are done so a day after they are assigned
4) You should not, repeat, not assign letters to any school until the letter is in AMCAS
5) Letters are not evaluated until your application is complete (Primary, secondary, MCAT, and LOR; this year was atypical with MCAT due to COVID)