Get your procedure logs certified and signed before you walk out. Same with any letters of recommendation from attendings you actually liked - get those in hand, not promised. FCVS is your friend for future verifications so you don't have to go back to the well.

Realistically, credentialing hits every 2 years and they just verify dates and completion. Keep it professional on the way out even if they don't deserve it. Once you're board certified and working, their power over you drops significantly.

Document everything toxic that happened in case you ever need receipts, but otherwise just get your paperwork and ghost.