First, the plan document must allow for involuntary rollovers; not all of them do. One place I worked, put the cap at $1,000 so they did not have to worry about forced rollovers.
Second, will someone please show me the exception to providing the 402(f) notice if the distribution will be less than $1,000 or $200?
It doesn't matter whether, or how much, taxes will be taken. If the distribution is eligible for rollover at all, the notice MUST be given, in my opinion. The special tax notice explains a lot of things other than the 20% withholding. It mentions withdraws under age 50 1/2. They types of accounts that may accept a rollover. It explains direct and indirect rollovers. It explains treatment of loans, Roth, company stock.
I see nothing in 402(f) that mentions any thresholds.
(OK, I probably wouldn't send one for a distribution under $10, as no 1099 is generated for that.)