[R. Scott]

It is the customer's sole right to determine whether a tip is given, the amount and who will be the recipient of his tip. Such rights are not only guaranteed by our constitution …

Did I miss something, or is this right one of the “certain rights” covered by the IX Amendment?

[SoothingDave]

Did I miss something, or is this right one of the “certain rights” covered by the IX Amendment?

It's a penumbra of an emanation.

SD

[George14]

Liberty is addressed both in the 5th and 14th amendement of the Constitution of the United States. Liberty is defined as the freedom of choice. Tipping is one of the greatest expamples of liberty we currently have in this country.
You have a choice. You have a choice as to whether you will give tip, you have a choice as to how much you will give and, regardless of the fact that many businesses owners don't want you to know it, you have a choice as to who will be the recipient of your tip. You can give anyone any amount you wish and it's guaranteed by our Constitution. You have the Liberty to spend your money however you choose.

Oh by the way, you might also be interested in knowing that in 1919 the courts ruled that is unconstitutional to prohibit American's from exercising their constitutional right to tip.