We are using it as a "hey let's not wait any longer to get that 5500 that's been sitting there for weeks to be e-filed, just in case the system crashes and no one is there to fix it".
https://www.irs.gov/pub/irs-drop/rr-25-15.pdf
The IRS issue guidance on uncashed checks in Revenue Ruling 25-2015 that may be helpful to you.
You can ask the actuary about question 11, but my understanding is that question would be answered as "no" and you would not attach a Schedule SB for the year following the termination where only payouts are being made.