In the earlier incident the offender threatened the employee with a knife, demanded money and then left the scene.
Detective Kelly Farrant said: "The footage speaks for itself and the victim has done very well to stay calm and hand over the money.
"We're very keen to prevent any further offending and if anyone knows who this is, please get in touch with us."
The offender is described as caucasian, 180 cm tall, aged between 20 and 30, of a slim build with short blond facial hair.
Anyone with information should call the North Shore CIB on 09 477 5261.
Information can also be given to the organisation Crimestoppers on 0800 555 111.