Credit cards may be in the wallets of most Americans, but not everyone is happy with their travel companion.

The Consumer Financial Protection Bureau released its monthly snapshot of consumer complaints in the financial services industry this week. The report, which regularly focuses on a different financial product to highlight consumer complaint trends, focused on credit cards and what irks consumers about their plastic friends (or foes, depending on how you view it).

Credit cards represent only about 10% of total complaints to the CFPB, a small amount considering how prevalent they are in Americans’ daily routine. That puts them in fourth for the most complained-about financial products, behind debt collection, credit reporting and mortgages.

Here are four of the major credit card complaints that surfaced in the bureau’s review.

1. Disputes Over Fraudulent Charges

Billing disputes were number one with a bullet on the CFPB’s top credit card complaint list. Of the nearly 100,000 complaints the CFPB analyzed, 17% were over billing disputes. Credit cards often offer purchase protections and chargebacks — tools consumers can use to combat faulty merchandise or high prices — and these tools are rarely offered by debit cards and never offered by cash. But fraud seems to be the source of most complaints, as consumers finding fraudulent charges have trouble removing them or making sure they aren’t double-billed.

How to Avoid It: The best way to keep yourself from having to dispute fraudulent charges is to keep your credit card information as safe as possible from fraudsters. Never share your credit card with shady sites that don’t have a “lock” symbol or use https:// when taking your data. And even though it’s convenient, avoid letting shopping websites “remember” your credit card info for next time. While some of those sites have excellent security, data breaches are becoming more and more common and credit card info is a literal gold mine for a hacker.

2. Rewards Program Murkiness

If you’ve ever owned a rewards credit card, you know that to make the most of your card’s program, you need to read up on all the details (and those details do change). The CFPB found that confusion over how a credit card rewards program works was sometimes due to differences between what consumers encountered online and what they were told by customer service representatives over the phone.

How to Avoid It: The CARD Act of 2009 did a lot to make credit cards more consumer friendly, but little regulation pertained to rewards programs specifically and business credit cards were not included at all in the act’s purview. That means you need to be a careful shopper, as you should be with all financial products — mortgages, business loans, you name it. Before you sign up for a rewards credit card, read the rewards terms carefully — they are often in a separate piece of paperwork from the APR and fee disclosures.

3. Being a Victim of Fraud/Identity Theft

Identity theft/fraud/embezzlement as a category came in third on the CFPB’s list at 10% of all credit card complaints. Many complaints pertained to account activity that the cardholder didn’t initiate. It points back to that top complaint of fraudulent charges as well — fraud is a problem for consumers as well as credit card issuers too.

How to Avoid It: In addition to keeping your credit card information safe (see tip #1), keep your identifying information safe. To open a new credit card in your name, a fraudster would need to have access to your Social Security number, name, address and other details. Protect that info and you limit your chance of getting got. And since “embezzlement” is included in this category as well, business owners should be sure to have a policy in place if they’re extending a company credit card to an employee. The rules should be clear so you don’t have to go through the painful process of disputing charges with your issuer.

4. Trouble Closing/Canceling an Account

Even though closing a credit card can do some credit score damage, it doesn’t stop consumers who want to avoid the temptation of spending too much or just have too many cards to manage. Roughly 7% of the CFPB’s credit card complaints pertained to consumers struggling to close accounts.

How to Avoid It: Call your issuer directly (you normally have a number on the back of your credit card) and ask to close the account. Be ready though — you’ll most likely be transferred to a department that is specifically going to try to keep you as a customer, perhaps offering a lower APR or a waived annual fee for that year. (Some consumers use this as a tactic to get a better credit card, in fact.) If you’re adamant on closing the card, just stick with it and make sure to monitor your email or mail for your last statement. You don’t want to miss the last payment on your card and put a black mark on your credit report just because you thought the card was closed. A credit card with a positive payment history, even though it’s closed, can still help your credit score. But missing a payment will definitely hurt it, and if you have a business credit card, it could impact not just your personal credit, but your business credit scores as well.