Prize Scams: http://www.consumer.ftc.gov/articles/0199-prize-scams
Top 7 Places to Report Sweepstakes Fraud: http://contests.about.com/od/conttestscams/tp/reportingfraud.htm
Fraud.org Contests and Sweepstakes: http://www.fraud.org/scams/general-fraud/prizes-and-sweepstakes
Federal Trade Commission (to Report Contest/Sweepstakes Fraud/Illegal Lotteries chose the Category "Other"): https://www.ftccomplaintassistant.gov/#crnt&panel1-1
I'll be adding more as I come across them.
Last edited by trex on Sat Feb 21, 2015 5:00 am; edited 4 times in total (Reason for editing : adding more)