Most of the European Concert tickets are uniquely identifiable, an original buyer may call the agency and then tell them that a ticket as having been lost or stolen or destroyed, and the ticketing authority may invalidate the ticket and issue a replacement with a new ID. If someone tries to enter a place with a ticket whose identity has been reported as lost or stolen, the scanner will reject that ticket. People may sell these supposed to be reported tickets and then the person buying them suffers losses.
In this type of scam even brokers can be victims, as many tickets sold by brokers were acquired by the broker who may have stolen tickets. A ticket may not be immediately reported as lost, even if the broker or the buyer can check the ticket at the ticket agency, tickets could be invalidated at a later date. When a consumer buys what turns out to be a bad ticket broker, the consumer will be refunded. But it's still a frustrating problem. Do not wait to check tickets and tracing their history.
In this type of scam even brokers can be victims, as many tickets sold by brokers were acquired by the broker who may have stolen tickets. A ticket may not be immediately reported as lost, even if the broker or the buyer can check the ticket at the ticket agency, tickets could be invalidated at a later date. When a consumer buys what turns out to be a bad ticket broker, the consumer will be refunded. But it's still a frustrating problem. Do not wait to check tickets and tracing their history.