Final answer:
The cardinal rules for using credit cards include paying bills on time, not using too much credit, and protecting your cards and personal information.
Step-by-step explanation:
The cardinal rules for using credit cards include:
- Pay all your bills on time to avoid late payment fees and negative impacts on your credit score.
- Don't use too much of the credit available to you, as high credit utilization can also negatively affect your credit score.
- Protect your credit and debit cards by keeping them in a safe place and reporting any lost or stolen cards immediately.
- Protect your personal information by using strong passwords and PINs that cannot be easily guessed.
- Use anti-virus software on your computer to protect against online fraud and identity theft.
- Notify your bank when you change your address or phone number to ensure your statements and notifications reach you.