"People just driving around the neighborhoods looking for packages and going up to the doorsteps and taking them. I've also heard of thieves following UPS trucks or FedEx trucks, and waiting for them to drop off packages and pick them up as they go along, kind of like a Grinch scenario," said Polk County Sheriff's spokesman Sgt. Brandon Bracelin.Authorities said it's a common crime in cities across the U.S. because it's so easy to commit."So, if you can be home that's the safest way to make sure you get your package upon delivery," said Bracelin. "This can happen anywhere, OK. It can happen in rural Polk County where houses are spread further apart. It can happen in an apartment complex because mass drop-offs happen in a common areas, where thieves can come in and take it."If you can't be home, consider having your packages shipped to your workplace instead or have a neighbor keep an eye out for you.Authorities said it's also a great idea to track your packages so you know exactly when they are expected to arrive.There are lots of apps for your smartphone to help track packages some, like Slice are free.Bracelin said the chances are pretty low you'll get your packages back if they are stolen so prevention is the best policy.If you think one of your packages has been stolen, first call the carrier to find out if there's been a delay in delivery. If there hasn't then call the police or sheriff's office to report the theft. 