I have to use my two unused reward certificate whose title is as below.
2011 Summer Promotion Free Night Certificate, Category 1-4 Hotel
Can I stay
1. two nights by using both the certificates
2.or can I stay just 1 night with using each certificate
I believe you can use the two certificates for two nights or you can use them for two rooms for one night. You may want to confirm this by calling Marriott Customer Service!!!!