I also was called by the above phone number, but the caller ID read CUNNINGHAN & MO, NOT CUNNINGHAM & MO as I also first assumed when trying to verify it. I was also suspicious when I was instructed to leave the check under the doormat.
I verified that this number is a valid number for Cunninghan & Moore, a Memphis fund raising organization that works out of the Shriners Temple, 5770 N. Shelby Oaks Dr., Bartlett, TN 38134. Their main phone is 266-4441.
Note: although they use these tickets to take kids from hospitals etc. to the circus, this donation is not tax deductible (which does not bother me. Giving directly to Shriners hospitals is tax deductible as they have 501(c)foundation. I am a Lion and know how hare it is to get the 501(c) designation, so we also have a foundation for our club, but donations directly to the local club are not tax deductible.
I hope this helps.