Originally Posted by medic51vrf

The way I was taught is to fold the note(s) so that it fits into the palm of your hand and then palm it as you shake hands with the person and say thank you. The person, if they are of class or have been trained well, will pocket the note(s) without looking at them and return the thank you. This provides a degree of discretion and removes the stress of over/under tipping when you hand the tip to the person.