Your credit card is an important life partner.
Before you use your card, be sure to look over how to use it one more time to be safe.
As soon as you receive your JCB card, turn it over and look at the back. Your journey with your JCB card begins by putting your signature in the box labeled "Signature." Don't forget!

From now on, any time you use your card you will be asked for your signature in order to prove that the card you are using is in fact your own.*1
Try not to make your signature too ordinary or easy for others to copy. Make sure to make your signature something special and unique that only you can reproduce.
Make sure that the name on your card matches your name exactly. The expiration date tells you how long your card is valid for.
The magnetic stripe on the back of your card is a vital component for storing your card's data and processing transactions online. If this area is damaged your card will become unusable. Do not place your card near any strong magnets. Try not to bend, scratch, or damage your card in any way.
Your card's value lies in the fact that only you can use it. If you encounter any trouble by lending your card to someone else, you will have to bear full responsibility for his/her actions. For example, you are not even allowed to lend your card to other members of your own family.
Keep your PIN number so that it does not fall into the wrong hands.
Do not store your card in the same place with any written record of your PIN number. Also, please refrain from using your birthday, home/mobile phone number, or any other easy to guess number as your PIN number. You should also try not to use the same PIN number as the one for your mobile phone, mailbox, locker, or any other PIN number you may have.
Never tell anyone your PIN number.
JCB, financial institutions, the police, or any other entity will never ask for your PIN number by phone or e-mail.
The following types of PIN numbers are easily guessed should you lose any other personal documents with your card. Therefore, they are not recommended.
If you need to change or check your current PIN number, please contact the company that issued your JCB card.