From Mail Tampering and Accidental Peeks to Deliberate Prying: Is Opening Someone Else’s Mail Illegal? US, UK and Australian Perspectives

Picture of Yasmin K. Brinkley, MBA, LLM

Yasmin K. Brinkley, MBA, LLM

Is It Illegal to Open Someone Else’s Mail? A Legal Perspective

In the age of digital communication, traditional mail might seem to be losing its relevance.

However, the fact remains that many important documents, including bank statements, legal notices, and personal letters, still traverse the postal system.

With such importance, the question arises: Is opening someone else’s mail illegal? This article will delve into the legal intricacies surrounding this issue in the USA, UK and Canada.

From Mail Tampering And Accidental Peeks To Deliberate Prying - Is Opening Someone Else’s Mail Illegal? US, UK And Australian Perspectives
From Mail Tampering and Accidental Peeks to Deliberate Prying: Is Opening Someone Else’s Mail Illegal? US, UK and Australian Perspectives

Is Opening Someone Else’s Mail Illegal in the US?

In the US, under Federal Laws, it is illegal to open someone else’s mail to obstruct communication or pry into their affairs. The protections in place are to maintain individual privacy and ensure the integrity and trust in the postal system.

US Federal Laws: Protection of Mail Privacy

In the United States, opening someone else’s mail is governed by federal law.

The United States Postal Service (USPS) operates under strict guidelines, and mail protection under its care is paramount.

The federal statute most directly dealing with this matter is 18 U.S.C. § 1702, which makes it a crime to take, open, or conceal mail that is not intended for the perpetrator with the intent to obstruct correspondence or pry into someone else’s affairs.

The statute reads, in part:

“Whoever takes any letter, postal card, or package out of any post office or any authorized depository for mail matter, or from any letter or mail carrier, or which has been in any post office or authorized depository, or in the custody of any letter or mail carrier, before it has been delivered to the person to whom it was directed, with design to obstruct the correspondence, or to pry into the business or secrets of another, or opens, secretes, embezzles, or destroys the same, shall be fined under this title or imprisoned not more than five years, or both.”

This provision underscores the serious nature of mail tampering. It is not just about violating someone’s privacy; it is about disrupting the mail system’s proper function and trust.

Exceptions and Inadvertent Openings: Is It Illegal to Open Someone Else’s Mail?

While the law is clear, it is also important to note that accidents happen. What if you mistakenly open a mail addressed to your roommate, believing it was yours?

Under the law, intent is a critical element. If someone opens mail genuinely believing it is theirs or if it was a genuine accident, it is unlikely they would be prosecuted.

State Laws and Variances about whether it is Illegal to Open Someone Else’s Mail

In addition to federal statutes, many states have laws concerning mail tampering or opening someone else’s mail.

While they typically mirror the intent and verbiage of the federal law, some might have steeper penalties or more specific definitions.

Civil Implications of Opening Someone Else’s Mail

Apart from criminal penalties, an individual could face civil consequences for opening another person’s mail.

If you opened someone else’s mail and, as a result, they suffered some form of damage (like financial loss or emotional distress), they could potentially sue for damages.

Prevention and Reporting

Given the seriousness of the offence, it’s essential to be proactive in preventing inadvertent mail openings:

  • Correct Addressing: Always ensure that your address is up-to-date with any institutions or individuals who regularly send you mail.
  • Communicate with Co-Residents: If you live with others, have a system for sorting and distributing mail to prevent accidental openings.
  • Promptly Return: If you receive mail not intended for you, write “Return to Sender” and place it back in the mail. Do not open it.

If you suspect your mail has been intentionally tampered with, or you are receiving someone else’s mail on a persistent basis, report it to the USPS or the Postal Inspection Service. They can investigate issues of mail theft or fraud.

Read article: Can I Find Someone’s Name Using Their License Plate Number?

Is Opening Someone Else’s Mail Illegal in the UK?

In the UK, as per the Postal Services Act 2000, it is illegal to dishonestly retain or open someone else’s mail that has been wrongly delivered to you. While genuine mistakes might not lead to legal consequences, it is essential to handle postal items with respect and integrity, acknowledging the privacy rights of individuals.

In the UK, the sanctity of personal mail is upheld by various legislative measures.

Opening someone else’s post without a legitimate reason can be perceived as an infringement of privacy, and legal consequences can ensue. Let’s look at the laws surrounding this issue in the United Kingdom.

The Postal Services Act 2000: Is Opening Someone Else’s Mail Illegal?

The primary legislation dealing with postal services and mail tampering in the UK is the Postal Services Act 2000. The s 84 of the Act focuses on dishonestly retaining a wrongly delivered item. It states:

“(1) A person commits an offence if he dishonestly retains any postal packet in the course of transmission by post which is wrongly delivered to him. (2) References in subsection (1) to a postal packet which is wrongly delivered to a person include a postal packet which is delivered to him after any wrongful interference with it.”

This means that if a postal packet, which includes letters, parcels, or other items delivered by post, is delivered to someone by mistake and they dishonestly retain it, they commit an offence.

“Dishonestly retaining” could involve opening someone else’s mail without any genuine cause or with the intent to keep, misuse, or dispose of its contents.

Proof of Intent in Opening Someone Else’s Mail in the UK

While the Postal Services Act in the UK criminalises the dishonest retention of wrongly delivered mail, the operative word here is “dishonestly”.

Accidentally opening someone else’s post without malicious intent might not lead to prosecution. To successfully prove a violation of this section, one would need to demonstrate the dishonest intent of the perpetrator.

For instance, if you share a household with someone and mistakenly open their mail believing it’s addressed to you, it would likely be considered an innocent mistake.

Conversely, if you intentionally open a neighbour’s mail out of curiosity, malice or any deceitful motive, you could find yourself on the wrong side of the law.

Potential Consequences of Opening Someone Else’s Mail in the UK

A person found guilty under the aforementioned section of the Postal Services Act could face serious consequences.

The punishment might involve a fine, imprisonment, or both, depending on the offence’s severity and circumstances.

In some instances, the breach of privacy could lead to civil litigation if the aggrieved party can demonstrate damages or harm caused by the unauthorised opening of their mail.


Given the potential legal implications, it is always wise to exercise caution when dealing with mail:

  • Promptly Return Misdelivered Mail: If you receive a post that isn’t addressed, it’s best to return it to the postal service or forward it to the correct recipient.
  • Clarify Names: In shared accommodations or offices, clearly marking names on mailboxes can reduce the risk of misdelivery or unintentional openings.
  • Report Suspicion: If you believe your mail is being intentionally tampered with, report it to the local authorities or the Royal Mail.

Read article: Is Flying a Drone Over Someone’s Property Trespassing?

Is Opening Someone Else’s Mail Illegal in Australia?

In Australia, under the Australian Postal Corporation Act 1989, tampering with someone else’s mail, including opening it without due authority, is an offence.

Although genuine mistakes might not result in legal action, it’s always prudent to handle mail with respect and care, acknowledging the rights of individuals to privacy and the secure receipt of their correspondence.

Much like other countries, Australia places significant importance on the sanctity of personal mail and the privacy it warrants.

Interfering with someone’s mail, which includes opening it without the recipient’s consent, has potential legal implications.

Here’s an exploration of the Australian laws surrounding this matter.

The Australian Postal Corporation Act 1989

The primary legislation concerning mail protection in Australia is the Australian Postal Corporation Act 1989. This act governs the operations of Australia Post and provides provisions related to offences concerning mail.

Section 85E of the Act outlines offences relating to mail receptacles. It states:

“A person shall not, without reasonable excuse, open a mail-receptacle that is not in the person’s possession or under the person’s control.”

Section 85H of the same Act also indicates:

“A person who dishonestly appropriates mail-receptacle contents is guilty of an offence.”

These sections provide clear guidelines against mail interference, including illicitly opening someone else’s mail.

Proof of Intent in Opening Someone Else’s Mail in Australia

As with legal provisions in many jurisdictions, establishing the intent behind an act is paramount.

The legislation specifies the need for a “reasonable excuse” in Section 85E, and the term “dishonestly” in Section 85H underscores this.

If a person accidentally opens mail with the genuine belief that it is theirs, especially in shared households, this might not be seen as an offence.

However, intentionally and dishonestly opening another person’s mail without their consent is entirely different and can lead to legal ramifications.

Potential Consequences of Opening Someone Else’s Mail in Australia

A breach of the aforementioned provisions can result in fines or imprisonment in more severe cases.

The consequences hinge on the specifics of the offence, including the offender’s intent, the nature of the mail contents, and any subsequent actions (like theft or fraud) stemming from the mail’s unauthorised opening.

State and Territory Variations

While the Australian Postal Corporation Act 1989 provides a federal perspective, there may also be specific laws or regulations within individual states and territories in Australia that address mail interference.

As with all legal matters, nuances might arise depending on the jurisdiction.

Read article: Can You Really Trespass on Public Property? Know the Boundaries of Public Property and Your Rights


To steer clear of potential misunderstandings and legal troubles:

  • Ensure Correct Addressing: If expecting mail, ensure the sender has the accurate and complete address. This can prevent misdelivery.
  • Immediate Return: If mail not intended for you arrives at your address, it’s best to return it to Australia Post with a clear indication it was misdelivered.
  • Open with Caution: Exercise extra care when opening mail in shared spaces. Ensure you’re only opening items specifically addressed to you.

Picture of Yasmin K. Brinkley, MBA, LLM

Yasmin K. Brinkley, MBA, LLM

Yasmin is an expert in Commercial Contracts, Securities Regulation, Corporate Governance, Intellectual Property and Media Law. Yasmin completed her LLB Degree and MBA in Toronto. She is a dual-qualified lawyer in Canada, and England & Wales, and an Adjunct Professor of Business Law. Yasmin helps small businesses and charitable bodies to navigate financial legalities.

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