Experts weigh in on tipping etiquette.

Tipping is tricky, yet necessary, but the etiquette can vary depending on where you are.

Read on for tipping advice from travel and etiquette experts.

Hotel worker carrying a tray of room service breakfast

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“Take the time to look up standards for the area,” she says.

Tipping is customary in Canada, for example, as it is in the U.S. And if you’re unsure whether your hotel has a service charge, just ask.

If you’re paying with a card, Betty Jo Currie, founder ofCurrie & Co.

Travels Unlimitedin Atlanta, says to find out if tip is included.

If you’re not paying by card, you may decide to leave a little cash.

“Ask whether the person is receiving tips from the actual bill,” says Danziger.

Assuming the food came from the hotel, it should be fine to do the same for room service.

(If it didn’t, you could pretend it did, Danziger says.)

That standard applies to full-service chains andboutique hotelsall the same.

“You want to ensure workers feel valued for the work they’re doing,” she says.

“If it’s not as high class, don’t decrease your tip because of that.”

The AHLA recommends tipping courtesy shuttle drivers and door staff $1 to $2 per person.

Tip the same amount for parking attendants, but only when you retrieve your car.