Speaking exclusively with PEOPLE, Cathy Diercksen, an independent agent with Marvelous Mouse Travels, reveals what red flags to look out for when booking a vacation through an agency. Getty"And when you're making a deposit, it's always going to go to that vendor," Diercksen says. "So, if you're going to book a Royal Caribbean cruise with me, yes, I'm going to collect your payment information. It should be a "very big red flag" if a travel agency is requested to be paid directly, rather than money going to the vendor. Overall, Diercksen tells travelers to be smart about booking their travel and be wary of anything even a little off.