In order to prevent the monthly card, season card and year card from being used by many people, the general gym will often take pictures. When opening the card for the first time, take a picture of your head with a digital camera or video camera. User information will be displayed every time you swipe your card. If the head portrait is wrong, you can see it right away.

Some gyms have commercial fitness cards that allow friends or family to be brought. One card can be used by the whole family, but the price is more expensive than ordinary single cards.