7 Items to Leave at Home — Not in Your Wallet

2. Birth Certificate

It's a critical piece of personal data that can be used to obtain a replacement Social Security card, a passport, or a driver's license. In short, you don't want to lose it, misplace it or have it stolen. Once it gets into a thief's hands, there is little you can do, according to the Identity Theft Resource Center. In the U.S. state governments issue birth certificates, which include date and place of birth. They serve as proof of age, citizenship and identity, according to the American Bar Association.

3. Medicare and Health Insurance Cards

Criminals can use your cards to access your account numbers, and obtain medical care that will be charged to your account or to send fake bills to your health insurer on your record.

"There's no need to bring your card to every appointment,” Lacey says, once your physicians and other medical practitioners have you Medicare or other insurance information. In an emergency, the hospital staff can confirm your coverage with the insurance company or the Medicare provider line.

4. Passports

It's best not to carry your passport with you, but to make a copy of it and leave it in a hotel safe while traveling.

A passport gives criminals access to your personal data, information that can be used to steal your identity. To report your passport lost or stolen as quickly as possible, contact the U.S. Department of State at 877-487-2778. Once it's reported by phone, the passport becomes immediately invalid, and cannot be used for travel.

5. Checkbook or Blank Checks

Stop carrying a blank check in your wallet or your checkbook in your purse. One blank check with your account number and bank routing number printed on it gives criminals access to every cent in that account. “The checkbook or blank check has the information to get (a thief) into the entirety of your account,” Lacey says. Once you lose your wallet containing a check, you'll likely have to close the account and open a new one. Unless you're checking your balance on a regular basis, you may not even be aware that money has been taken out of your account.

6. Password Cheat Sheet

While this might seem innocent enough, it actually presents a major risk. It “might just be the worst thing to lose,” says Drew Paik, business development director for Authentic8, an internet software company focused on security in Mountain View, California. “Passwords can be used to access your accounts, which can result in immediate losses and long-term damage to your reputation and credit report.” For example, he says, someone could log into your social media accounts and post as you, then tweet or post something that could make you look bad.

Some passwords may seem unimportant, he says, like the one for your Gmail account. That email and password can be used to reset passwords on other sites, including your bank accounts. If you're using the same password on multiple sites, it can give a criminal access to every site you have that uses that same password, including your Facebook account. Alternates are to use a password manager or a mnemonic — a pattern of letters, ideas or associations that helps you remember something — with a different code for each website. You'll have a unique password for each site.

7. Work Identification Badge

An employee identification badge can include encoded information about an individual by using barcodes, magnetic stripes, radio-frequency identification (RFID) tags, and smart chips. Some companies use first name only to protect the employee. However, thieves use the badge to obtain more information from individuals, says cybersecurity expert John Sileo. Once they have information such as an employee identification number, they are able to obtain other data from that individual. Report a lost or stolen identification badge to your employer as soon as possible.

Editor's note: This article was originally published on August 13, 2019. It has been updated with the AARP Top Tips video.