” You may have been told that you can protect yourself against credit card fraud by writing “See ID” or “Check ID” rather than signing your name. The idea behind this is that, should someone steal your credit card, they’ll be unable to use it without also having your ID. However, most merchants are prohibited from accepting cards that don’t have the user’s signature.  Look at the fine print on the back of your card. It probably contains a statement similar to: “Invalid without an authorized signature.” Also, most store clerks will swipe your credit card without even glancing at the back of it to confirm your signature. Technically, you’re legally required to sign your credit card before use in order to validate the card. Some store clerks may refuse to swipe your card if they see that you haven’t signed the back.  With the increasingly prevalence of chip readers and self-service card readers (e.g., at gas pumps), many store clerks don’t have the opportunity to ask to see your card.  Leaving the back of your card blank in no way increases the security of your credit card. A thief could feasibly use the card with or without your signature. If you’re concerned about a potential thief using your signed credit card to make purchases, the best way to protect yourself is to make sure your credit card has fraud protection. Contact your credit card company’s Customer Service department and ask if your account has fraud coverage. If you do have fraud protection, U.S. laws limit the cardholder’s liability to $50.

TL;DR in Indonesian:
Jangan tulis “Lihat KTP”. Jangan biarkan kolom tanda tangan dalam keadaan kosong. Pastikan bahwa kartu kredit Anda memiliki perlindungan terhadap penipuan.