Originally Posted by cargueiro

There are many companies doing these services of ICTS. At CDG you will probably only encounter ICTS but there are many other companies around the world providing similar services. Some are owned by ICTS, some are partnered with ICTS and some are competition to ICTS.

When it comes to stickers, these may or may not be used according to practices developed for that airline in that station. With stickkers, these ICTS type companies generally are looking to prevent inadmisssable pax from boarding aircraft. I won't say more than that as pax need know no more as to why they are used...

Just peel the sticker off once in the air. Is that so hard? And be polite to these guys! They are actually reducing your airfare by reducing inadmissable fines to the carrier you are flying on... They do ask the same questions to almost everone but there is a reason why they do...