Elf Qrin's Cyber Lab

since 1999

Credit Card Frequently Asked Questions (FAQ)

Who uses credit cards? How credit cards work?

Everybody, many adults anywhere in the world own more than one credit card. Nowadays most shops accept credit cards and they can be used to make purchases online.

How many credit cards should you have?

You'd better have at least two debit or credit cards of two different networks (for example Visa and MasterCard) so that one of the cards is refused or one network is not available for whatever reason, you still can have funds and buy goods or services with the other card.

Who is the credit card holder?

The credit card holder is the person to whom the credit card is registered, whose name is printed on the credit card on physical cards.

What credit cards allow a cosigner?

A credit card holder may ask the bank to have another person authorized to use their card.

What credit cards should I have? What credit cards can I get? What credit cards are accepted worldwide? Which credit cards do accept online stores?

Most accepted credit cards all over the world are Visa and MasterCard.

Why credit cards are important? Are credit cards bad? Are credit cards good?

Credit cards aren't intrinsecally good or bad. They make payments quick and easy. Unfortunately they can be misused for frauds, or in good faith by people that may spend too much.

Are credit cards considered money? Why credit cards are not money?

Credit cards are not properly money, they have no legal tender, they must be covered by the credit of the holder, but they work as replacement for money in most situations.

Are credit cards free? Why credit cards charge annual fee?

Credit card companies generally charge a fee to cover their expense, which include card protection cover to refund from losses for stolen, lost, or cloned cards.

Are credit cards insured? Which credit cards offer price protection?

Most credit card companies protect their customers from frauds or other risks arising out from stolen, lost, or cloned cards. Sometimes, they offer extra protections, like travel insurance.

Why credit cards are stolen? Why credit cards are cloned? Why credit card numbers are stolen?

Just like any other human activities, credit cards can be targeted by criminals. Credit card companies usually offer card protection cover to protect their customers from frauds.

Can credit cards be tracked? Can you get caught using fake credit cards?

When you use a credit card you leave traces: the operation is traced, the money transfer from the source to the destination is traced, and if you operate online there will be a trace for the online activity too.

When credit cards are reported?

Anytime credit cards are misused they are reported.

Why credit cards have PIN?

The PIN of a credit card should be known only by people authorized to use such card. It's a security measure meant to prevent strangers to make payments or misuse the card.

Where is the security code?

The security code is normally a three digits number printed in the back of the card.

When a credit card expires? Why credit cards expires?

Credit cards expire because they are reissued periodically to make sure they are still funded and they can still be honored. The expiration date (and sometimes the issuing date) is printed on the front of the card.

Why credit cards offer rewards?

Many credit card companies run loyalty programs that offer cash back or points to keep their customers. Sometimes they are tied with loyalty programs offered by other companies, like air miles of airlines for their frequent flyers.

Why credit cards are good for college students? Why credit cards are bad for college students?

Credit cards are practical and useful to students because they can be recharged remotely by their parents.

Can credit cards be used internationally?

Yes, credit cards are accepted almost anywhere in the world and also on online shops and marketplaces, like Amazon or eBay. Your bank may block some foreign countries for safety reasons, but you may ask to unblock them if you have to travel there.

What's the material used to make credit cards? Are credit cards recyclable?

Most cards are made of polyvinyl chloride (PVC). Their plastic is not easily recyclable and in fact they are hardly recicled.
Some companies, like American Express or N26, are also issuing metal credit cards (for example American Express Centurion Card, also known as Black Card, which is invitation only).

Can credit cards get wet? Are credit cards waterproof?

Yes, credit cards are waterproof, even in salt water. Even their chips are sealed in epoxy resin.

Declined Card Messages

Decline TypeMessage for the CustomerMessage for the Merchant

Insufficient Funds

The transaction was declined due to insufficient funds in your account. Please use a different card or contact your bank. The card has insufficient funds to cover the cost of the transaction.


Your card was declined. In order to resolve the issue, you will need to contact your bank. The customer's bank has declined their card. The customer will need to contact their bank to learn the cause.

Temporary Hold

Your card has a temporary hold. Please use a different card or contact your bank. The issuing bank has a temporary hold on the card. ('Do Not Honor' response).

Fraud Stolen Card

The transaction was declined. Please use a different card or contact your bank. The card has been designated as lost or stolen; contact the issuing bank.

Invalid Card or Account Number

Your card number is not valid. Please update your card number. The credit card number is not valid. The customer needs to try a different number.

Expired Card

Your credit card is expired, please update your card. The payment gateway declined the transaction because the expiration date is expired or does not match.
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