In recruitment ads, the salaries quoted are gross amounts per month. You can ask a prospective employer how much this will equal net per month. The employer is legally required to pay a 13th month at year-end and an extra month salary around summer holiday period. These extra salaries are taxed very highly. Tipping is not widely expected.
Service is included in the price of meals at restaurants and in most other services.
Only at the end of the year will the mailman, cleaning lady, garbage man and concierge expect to receive some form of a tip. Mailmen usually sell calendars. For example 17 April 1999 instead of April 17th 1999. The number 7 is written with a dash through its stem. An American 7 may be confused with a 1.