Gratuity

Put yourLegend has it that tip is an acronym that stands for "to insure promptness".

Tips (also known as gratuities) are received by some service sector professionals by persons they serve. These transactions are governed by social custom. There are no standing rules or obligations concerning whether to tip (tip is both a noun and a verb), who to tip or how much.

Some establishments forbid their employees to accept tips.

What occupations are subject to tips varies by locale and culture. In the United States, these people are likely to expect to be tipped:

• waiters
• cab drivers
• people who shine shoes
• hotel porters
• valet parking attendants

(many others. the present doesn't frequent high-end establishments)