Sell Leave
 

Did those who separated/retired have to do any admin stuff to sell back leave?

Why do that? Use terminal leave and collect all of your allowances and medical coverage.

One of the reasons to sell leave is the condition of the economy. When I retired, no one was hiring. I worked right up to the last day and then had 90 days of base pay to tide me over for a few months while I looked for a job. Of course, the optimal is to get hired just before you retire, take terminal leave, and start training with your airline. The guys that pulled this off were my heroes!!

My understanding is that once on terminal it's only base pay. No fly pay or BAH. Same with selling back leave. Anyone know for sure?

I worked up to the last day too.
I had no reason not to, I didn't have a job lined up. The check that came to the direct deposit some time later was a nice infusion to the checking account.
EFD01 - no....I don't remember having to do anything special to request for the leave payback.

USMCFLYR

I think you get BAH/BAS, not sure about incentive pays.

Base pay and I think it's automatic (at least it used to be).

When I separated in August, I had to fill out a piece of paper for Finance that said how many days I was selling back (which was 0.5). No big deal.

Never sell leave, it's taxed to about 25% at the federal level and you don't have benefits or incentive pays for the period you sell you only get your base pay/BAH/BAS. I know it seems tempting, but you'd be best to not do it.

Your paycheck on terminal leave should be the same as it was before (I.e. you get BAS/BAH flight pay etc). When you sell leave back you only get your base pay which is why most people say its a bad deal but each situation is unique based on what you do or don't have lined up. The 25% tax is an IRS rule but you will probably get some of that back when you file taxes for that year based on your other income and deductions.