Yes, it is illegal to open someone else’s UPS package in almost every situation, but the law that applies is probably not the one you’re thinking of. The federal mail theft statute most people have heard about covers only items handled by the U.S. Postal Service, so UPS deliveries fall under a different federal law and under state theft statutes. Depending on the value of the contents and what you do after opening the package, the consequences range from a civil bill for the item’s value to a felony conviction.
The Mail Theft Statute Doesn’t Reach UPS
When people picture “mail theft” as a federal crime, they’re thinking of 18 U.S.C. § 1708. That statute makes it a crime to steal or tamper with mail, but it only applies to letters and packages in the custody of the U.S. Postal Service, or taken from mailboxes and post offices.1Office of the Law Revision Counsel. 18 U.S. Code 1708 – Theft or Receipt of Stolen Mail Matter Generally Deliveries by private carriers like UPS, FedEx, and Amazon are not covered. So if someone opens a UPS package on your porch, § 1708 is not the hook.
That doesn’t mean federal law is silent. It just means a different statute does the work.
The Federal Law That Does Apply
The relevant federal statute is 18 U.S.C. § 659, which criminalizes stealing or tampering with goods that are part of an interstate or foreign shipment carried by a common carrier. UPS is a common carrier that moves packages across state lines, so a package in its delivery chain qualifies as an interstate shipment. The statute reaches anyone who steals, carries away, or obtains goods by fraud from a vehicle, warehouse, freight station, or other facility used in interstate shipping.2Office of the Law Revision Counsel. 18 USC 659 – Interstate or Foreign Shipments by Carrier; State Prosecutions
Penalties scale with value. Goods worth $1,000 or more carry up to 10 years in federal prison and a fine. Below that threshold, the maximum drops to 3 years and a fine.2Office of the Law Revision Counsel. 18 USC 659 – Interstate or Foreign Shipments by Carrier; State Prosecutions The $1,000 line is where a relatively minor federal offense becomes a serious felony.
Section 659 also says it does not block states from prosecuting the same conduct. One act of package tampering can lead to both federal and state charges.
State Theft and Porch Piracy Laws
Most package theft cases are prosecuted at the state level, under general theft or larceny statutes. Every state criminalizes taking someone else’s property without permission, and a UPS package on a porch is property like any other. Whether the charge is a misdemeanor or a felony usually turns on the value of what was taken. Felony theft thresholds vary widely, from a few hundred dollars in some states to $2,000 or more in others. The same $200 item can mean a misdemeanor in one state and a felony across the border.
A growing number of states have passed laws aimed specifically at “porch piracy.” These statutes may reclassify package theft as a higher-grade offense, let prosecutors charge it as either a misdemeanor or a felony regardless of value, or add enhanced penalties for repeat offenders. The spread of these laws has tracked the growth of online shopping and the rise of doorstep deliveries.
Intent is central to any theft case. If you knowingly open a package addressed to someone else and keep the contents, a prosecutor can argue you intended to permanently deprive the owner of their property. That intent element is what separates criminal theft from a civil mix-up.
Civil Lawsuits Are Possible Even Without Criminal Charges
Criminal prosecution isn’t the only risk. Opening someone else’s package can also lead to a civil lawsuit, and the standard of proof there is lower.
The most common claim is conversion, which is the civil equivalent of theft. Conversion happens when someone exercises unauthorized control over another person’s property in a way that seriously interferes with the owner’s rights. Opening a UPS package and then using, discarding, or refusing to return the contents fits that definition. A successful conversion claim typically ends with the court ordering payment for the full value of the items.
An invasion of privacy claim is also possible, particularly where the package contained sensitive or personal items. The theory is “intrusion upon seclusion,” which applies when someone intrudes into another person’s private affairs in a way that a reasonable person would find highly offensive. Packages containing medical supplies, financial documents, or personal correspondence can support that kind of claim.
Where conduct is especially reckless or malicious, courts may add punitive damages on top of actual losses. Those are more likely in cases involving repeated interceptions or clear dishonesty rather than a one-time mistake.
What to Do if a Package Is Misdelivered to You
Mistakes happen. A driver leaves a package at the wrong house, and you carry it inside without looking at the label. What you do next is what the law cares about. A misdelivered package still belongs to the person named on the label, and keeping it without any effort to return it can create liability for conversion.
If a package arrives that isn’t yours, a few simple steps keep you safe:
- Don’t open it. Once you realize the package isn’t addressed to you, stop. Opening it can be treated as tampering even without bad intent.
- Check the address. If the intended recipient lives nearby, walk the package over.
- Contact UPS. Call UPS or use their website to report the misdelivery and ask them to pick it up or redirect it.
- Mark and return it. Write “delivered to wrong address” on the package and hand it to the driver on their next visit.
If you already opened it before realizing the mistake, reseal it as best you can and follow the same steps. The point is to show good faith. Save chat logs, emails, or call records with UPS. Someone who opens a package by accident and immediately tries to get it to the right person is in a very different legal position than someone who opens it, sees something valuable, and goes quiet.
The Unordered Merchandise Rule Doesn’t Help
People sometimes confuse misdelivered packages with unordered merchandise. Under federal law, if a company sends you a product you never ordered, you can keep it as a free gift and you never have to pay for it.3Federal Trade Commission. What To Do if You’re Billed for Things You Never Got, or You Get Unordered Products That rule protects consumers from scams where companies ship items and then demand payment.
A misdelivered UPS package is a different situation. The package was ordered by someone, paid for by someone, and addressed to someone, just not you. The FTC rule does not give you the right to keep a package meant for another person. Treating it as a free gift because it landed on your doorstep is a fast way to end up facing a theft or conversion claim.
Packages Delivered to a Workplace
Packages at a business address raise a slightly different set of issues. If UPS delivers a package to your office addressed to a coworker by name, the same rules apply. It’s not yours to open. The theft and conversion exposure is the same as in a residential setting, and opening it can also get you fired. Most employers have mail-handling policies, and violating them is grounds for discipline even if no law was broken.
Packages addressed to the company itself are different. Employees authorized to receive business deliveries can open those as part of their job. The line gets blurry when someone has a personal order shipped to the office. Employers generally do not violate federal law by opening mail or packages delivered to the workplace, but an employee whose personal package is opened by a supervisor may have a common-law privacy claim depending on the circumstances.