I was under the impression the bag was checked on a flight taken by a relative. I think this thread serves as a warning to always make sure checked bags have the correct tags. I'm not sure how people can disagree with this.
A number of posters like to, wrongly, correct posters who equate RAC with DME. Disney uses the term DME to refer to 3 separate services, passenger shuttle bus service, inbound luggage handling and RAC. Disney CMs are involved with delivering your bags at your resort to your room and some supervisory functions at MCO. All other services are contracted out to at least 3 different vendors.
For the benefit of posters who don't think RAC is part of DME
https://maketraveleasier.com/BagsVIP/rac
BAGS Inc says the service name for RAC at Disney is
Disney's Magical Express