Originally Posted by
Tennisbum
You get your passport stamped at Immigration, not Customs.
For some reason, they've stopped stamping passports automatically, but will do it if you ask. (I always ask, coming and going, in case I ever need to prove that I didn't overstay.)
Whenever I reach an immigration officer at CDG, I always ask, "J'aimerais un compost pour souvenir, SVP." They always oblige. ^
Not so upon arrival at GVA. The Swiss immigration officer gave me shrug and waved me through