Byron Shire Council has acknowledged that some of its current measures to protect wildlife from vehicle strikes have limited effectiveness, while funding has yet to be secured for seasonal electronic warning signs on several key koala routes.

Northern Rivers businesses are once again being urged to check cash carefully following reports of counterfeit $100 notes being used at local shops.

Health authorities have issued a measles alert after a confirmed case visited eight locations across Byron, Ballina and Pottsville while infectious.