5 Ways Other People Can Ruin Your Credit Score, and How to Protect Yourself

Attacks on your credit don't always come from online hackers or strangers lurking in the shadows behind an ATM. What happens when your credit is harmed by your own family and friends? Or even your employer?

While data breaches are the most common risk, Javelin Strategy & Research data reports that in 2014, 550,000 victims of fraud and identity theft had their credit compromised by someone they knew.

man looking at computer frustrated and confused
man looking at computer frustrated and confused

Image Source: Getty Images.

Here are a few of the most common ways that other people can affect your credit score, along with some ways to protect yourself.

1. When you're an authorized user on someone else's credit card

You may think that being added as an authorized user places all the responsibility on the primary cardholder, but in fact, your authorized-user status will also be reported to credit bureaus. While you aren't primarily responsible for repaying the debt, all activity associated with the account will show up on your credit report.

This is why becoming an authorized user is sometimes recommended as a way to build credit. If the primary cardholder users the credit card responsibly, you'll likely see an increase in your credit score. However, if they're making late payments or using a big portion of their available credit, you will probably see your credit score go down.

In rare instances, employers may even add employees as authorized users on their personal credit cards instead of opening a business credit card. While a business credit card will not impact your credit, being added to your employer's personal card will, and it's not recommended.

You can protect your credit score by becoming an authorized user only on accounts owned by people who are financially responsible. Never agree to take on credit liability for a job, and only accept business credit cards that will not affect your credit. If you find your authorized user status is damaging your credit, then you can call the credit card company and have yourself removed.

2. When you have a joint checking account

While your checking account does not have a direct effect on your credit score, unpaid overdraft fees and late penalties that are sent to collections will affect your credit score. In the case of a joint account, both parties will be affected.

One owner of a joint checking account tried to close the account after splitting up with her partner but found out several years later that his portion of the checking account was never closed and continued to affect her credit even after he'd passed away. Because he'd left overdraft fees unpaid until they were sent to collections, she saw a drop in her credit score and was responsible for paying off the collections bill.