Some companies even claim to have an official relationship with TripAdvisor while others have resorted to blackmail, extortion and financial fraud against businesses which use their services. TripAdvisor has asked for hospitality business owners to report any such approaches to their Content Integrity team at fightfraud@tripadvisor.com. The letter says: "It is common that owners have reported that once they engaged with these types of companies, they have been subjected to blackmail, extortion and financial fraud when they have tried to disengage from their services. Get the full story at Tnooz