If you’re worried that your spouse may be engaging in some less-than-desirable activities, their tech devices may be able to provide the clues you need to confirm your suspicions. While behavioral clues can be a challenge to prove, technology doesn’t lie. Clues left behind on various devices like computers, cell phones, and GPS devices can often be a dead giveaway that your spouse has been deceiving you. But first, you need to know where to look.

Cell phones are your best bet

Your spouse’s cell phone could contain some pretty serious clues. The simplest ones to find are usually suspicious calls or text messages or saved contacts with unusual or unfamiliar names. A simple Google search may even reveal the owner of the unknown number. There may also be some evidence of foul play in emails, text messages, voicemails and secondary messaging and video chat apps. Unless old messages have been permanently deleted, you can usually still view deleted messages in the “deleted” or “trash” folder for quite some time before the device purges the content. Depending on the carrier your spouse uses for their phone, and your access to the account, you may even be able to find backups of their data online without ever touching the phone itself.

If your spouse is really going all out, they may elect to purchase a separate phone or SIM card to keep things on the hush-hush, but it’s possible they will slip up at some point. They may accidentally call you from their “other” phone in which case you can try calling the number back when your spouse is home to see if it rings. If you find a SIM card lying around, pop it in a phone to see what you find.

Location technology

Many popular devices utilize some form of location technology and often make it easier to have the service turned on than to disable it. If your spouse uses an Apple device that is connected to a family account and they have enabled location sharing, you can locate their device by logging on to iCloud.com and clicking on Find My iPhone or by using the Find My Friends app.

If your spouse uses an Android phone and is logged on to Google on a shared computer, you can type “Find My Phone” into the search bar and you’ll be provided with the phone’s location. Google is an easy application to accidentally stay logged in to so this may be an easily obtainable clue.

GPS

As we become more reliant on GPS these days, you may also want to take a peek at your spouse’s location history. The “previous destinations” menu option on a navigation system or the Google Timeline feature for Andriod users (found in the Google Maps app or Google Maps online if they are logged in) can give you some insight into where your spouse really was when they said they were stuck in traffic. If your spouse uses an iPhone, you can find their frequent locations in Settings > Privacy > Location Services > System Services > Significant Locations. It takes a fair amount of effort to consistently disable or delete these types of settings so if they are up to no good, you’re likely to find something here.

Other places to look

Nearly every activity we do can be linked back to our technology in some way. Check out the browser history on your shared computer or device for unusual site visits, the device’s trash or recycling bin, or any cloud-based file backup services that your spouse may use like iCloud, Google Drive or Dropbox. Many of these cloud-based services even let you restore deleted files after they have been deleted on another device. Another thing to keep an eye out for is an app that can be used to hide photos, videos or other apps. Some potential apps to note are KeepSafe, Vault and Hide it Pro.

Remember to play it safe when it comes to the legalities associated with snooping. If you have to work too hard to access something, you may be creeping into hacking territory, which could cause issues down the road should you find yourself facing a divorce.