Travel cards are to be made available to teenagers on Teesside in a bid to cut disputes about half fare entitlement on buses.
Under-16s are eligible for half price travel on buses in Stockton, but there is concern the system is being abused.
Stockton Borough Council has introduced the voluntary photo-cards which show the date at which the holder becomes 16, and half fare entitlement ends.
The cards cost 30p and are available from any travel office in the town.
Anyone wanting a card has to provide proof of identity and age, such as a birth certificate.
John Kavanagh, senior transportation engineer with Stockton Borough Council said: "It is very, very difficult to tell whether anyone is 14, 15, 16, or 17.
"A number of young people, hopefully a small minority, will try to con the driver that they are under 16.
"There have been a number of arguments on buses, which disrupt the service, makes it unpleasant for young people and puts a lot of pressure on drivers.
"This card is primarily for those youngsters who are 14 or 15 and get refused half fare because they look older.
"For those who do not carry the cards, and where there is doubt, the driver's decision is final."