then yes, you should have no problem using your Marriott cheques to pay your bill (with limitations found below)

see, https://www.marriott.com/rewards/terms/moretrms.mi

Marriott Cheques may not be acceptable at concessions within the hotel not owned or operated by the Company. Please confirm with the hotel prior to making the purchase.
Marriott Cheques are not redeemable for cash or Marriott gift certificates or The Ritz-Carlton gift certificates. Change will not be given on cheques presented as payment for goods and services. Cheques are void and will not be honored if sold for cash or other consideration.
Marriott Cheques may be used for all publicly listed and available room rates and packages, but cannot be used for convention, travel industry, tour, advance purchase, catering, or group room rates.
Marriott Cheques are transferable but are not replaceable if lost, stolen, destroyed, or expired.
Any tax liability, including disclosure, connected with receipt or use of this Reward is the recipient's responsibility.
Marriott Cheques are accepted at face value in U.S. dollars. Cheques will be converted into local currency value at the hotel's current exchange rate