Counterfeit Boston Celtics tickets are cropping up...

Counterfeit Boston Celtics tickets are cropping up for home games in Boston Garden, which have been sold out since 1982.

“There’s a lot out there,” said Stephen Riley, Celtic vice president of sales.

Most of the seats go to season ticket-holders “and there’s a certain way you can tell the difference. We can’t tell unless we see the tickets,” Riley said.

Since the fake tickets were discovered, security has been increased and the Celtics have bought advertising space in local newspapers to alert fans.