Football has taken the first steps in eradicating the scourge of touts selling tickets at inflated prices.
Chelsea and Manchester United have set up online exchanges where season ticket holders can sell spares to members.
Prices are fixed and will be calculated as a fraction of the cost of a season ticket - a system that has already been used for sports in the United States.
Touts who are banned from buying tickets will also be barred from the exchanges, the clubs said.
The sites are hosted by US firm viagogo which runs ticket exchanges for American football, basketball and ice hockey teams.
It will take commission on the sale of each ticket, with fans receiving 85% of its face value.
The sites are expected to spread to other Premiership sides and other sports should they prove successful.