NEW YORK (AP) — Do you leave a tip in your hotel room for the maid? Marriott is launching a program with Maria Shriver to put envelopes in hotel rooms to encourage tipping.

The campaign, called “The Envelope Please,” begins this week. Envelopes will be placed in 160,000 rooms in the U.S. and Canada. Some 750 to 1,000 hotels will participate from Marriott brands like Courtyard, Residence Inn, J.W. Marriott, Ritz-Carlton and Renaissance hotels.