Yes. You need to tell them that you do NOT want contrast piping. Otherwise They will give you piping.
Is it true that by "default" if you place an SO for a contrast lined Birkin, the piping colour is automatically matched with the colour of the lining inside? eg. If you ask for black birkin/orange lining, the piping will be orange as well, unless you specifically ask you want the lining to be black as well?
If that's true I find it rather weird, shouldn't it be the other way round - eg. they'll do contrast piping only if you ask for it?
For those of you who have done the SO for contrast lining recently, did you have to ask them not to contrast line the piping as well?
Actually, I've placed several special orders and have never had to tell them to not do contrast piping. They usually have a few different preset options and it depends on which one you choose.