To avoid losing money for no apparent reason, you should remove payment cards from iTunes. Delete Visa, MasterCard, and Amex cards from your iTunes account if you no longer need them, as this will help limit risks and additional costs.
If you've ever linked your Visa, MasterCard, or other payment cards to iTunes or the App Store to purchase paid songs, apps, or games that you no longer need, you can remove the payment card from iTunes to ensure your account information isn't leaked when you lend your iPhone or iPad to someone, preventing potential financial losses.
INSTRUCTIONS FOR REMOVING PAYMENT CARDS ON ITUNES
Step 1: Log in to your Apple account linked to your payment card on iTunes.
Step 2: After logging in, select Account -> View My Account… to change your account information.
Step 3: In the Payment Information section , select Edit to modify your payment information and remove the iTunes payment card.
Step 4: You can add or remove your payment account in the Payment Type section . To remove a payment account, select None; your account will no longer be linked to any payment card. You can still freely purchase free apps on the App Store without a payment card.
Step 5: You can change some personal payment information in this section. After removing the payment card from iTunes, scroll down and select Done to complete the payment information changes.