With security breaches a regular item in the news cycle and an increasing consolidation of our personal information on web-based platforms, identity theft is a big concern for all of us. In the final installment of our financial literacy series, we take a look at what is considered identity theft, what you can do to prevent it from happening to you, and what to do if your identity is stolen.

Identity theft can look like a lot of different things. At its most basic, it’s simply the intentional use of someone else’s identity. It’s most primarily done for a financial benefit, such as the use of credit or other monetary gain. But not always!

Your driver’s license carries a lot of personal information about you: name, date of birth, address, photo. In the wrong hands, it can be used to make purchases that require an ID (such as alcohol, tobacco, or certain kinds of medications), open bank accounts, or avoid speeding tickets.

Your Social Security number can be used to open new lines of credit or other financial accounts, obtain medical care under your name or your benefits, commit tax fraud, steal your Social Security benefits, and more.

Debit and credit cards can be used to make unauthorized purchases, rack up debt, and open additional lines of credit. Cards can also be used to get cash from a linked checking account or to issue cash advances. Debit and credit cards can be used quickly to make very large and expensive purchases before you’ve realized what has happened.

Your mail be can be stolen in transit, from unsecured mailboxes, or even from your trash. Valuables (such as cash, checks, or other items) may be removed from your mail before you even see it. Discarded mail can be used to open accounts, start new lines of credit, or commit loan, benefits, or tax fraud.

Online identity theft is increasingly common. Security breaches with credit bureaus, credit card issuers, retail establishments, and social media platforms have left financial and other sensitive information vulnerable to theft. Online fraudsters can make unauthorized purchases, open accounts or lines of credit, and commit other types of fraud.

Don’t use the same password over and over and don’t choose combinations of letters or numbers that will be easily guessed or quickly recovered by password hacking software.

Make a habit of shredding any paper, including mail, that you plan to discard if it has your name and address, Social Security number, or other personal information.

Don’t carry your Social Security card with you (a safe deposit box or fireproof safe are good places to keep it instead!). Know where your driver’s license, debit cards, and credit cards are at all times.

Regularly check your credit reports and all bank statements for any inaccurate information or evidence that someone else may be using your name or Social Security number. Report any discrepancies that you notice as soon as possible.

Getting a new credit card account number or replacing a driver’s license can be a huge hassle—but it’s a less painful process than dealing with cleaning up a stolen identity.

The first thing to do is always to report it. IdentityTheft.gov is the federal government’s resource for reporting and managing an identity theft. File a police report to let them know what has happened and to alert them to possible scams or trends in your area.

You’ll also want to contact any account or institution that may be affected by this theft, such as card issuers, other financial institutions, utility companies, credit bureaus, the department of motor vehicles, or the Internal Revenue Service.

You can put a fraud alert on your credit report or even freeze it temporarily. It’s best to let them know as soon as possible what has happened and try to stop any further damage. Many institutions have policies in place to limit your liability for unauthorized funds spent—but not all.

Change all your account passwords, get new account numbers and cards wherever possible, get a new driver’s license (with a new number), and keep a very close eye on your credit report for any changes. You may also request a new Social Security number from the Social Security Administration, but they are, historically, very difficult to get and may not solve as many problems as you might hope.