A product or content that is normally prohibited for mailing is non-mailable. When the items are detected in the mail system, they will be held by the postal inspection service. Such products include unsafe goods, weapons, bombs, switchable knives, inflammatory tools, illegal drugs, motor vehicle master keys, cover-up invoice ads, and perishable content which could go wrong before distribution. Here are things that the postal service or North America logistics must refuse to carry:

Products that are prohibited by law, for instance: illegal, fraudulent, or obscene materials

• Any substance that breaches an Act of Parliament
• Products and do not comply with certain requirements or characteristics
• Any substance that could pose injury or harm to people handling the mail 
• Any material that could damage postal equipment or any other thing
• Any product that can cause entrapment of other materials
• Any Sexually explicit material unless they’re submitted in an opaque wrapping and labeled with the words of “Adult Material”

NOTE:

Sexually explicit goods that are delivered by direct mail, community email or the postal code including photographs of pornography that signify sexual behavior, photos of sexual contact that implies humiliation or abuse, a letter detailing sexual activities in a solely technological manner, without any context signifying degradation or violence.

Any content that violating section 52 of the Canada Post Corporation Act and Regulations, or contains a label, or term, in violation of section 58, is considered as non-mailable. 

• Customers should make sure all things that they are mailing are acceptable to send. 
• The customer is also responsible for ensuring that a package has been paid and packed correctly before depositing to Canada Post
• The object is not a non-mailable matter 
• Mailing is allowed under applicable legislation

Handling Of International Inbound Non-Mailable Matter

If international inbound products are found to be non-mailable, it will be instantly removed from the mail stream. Moreover, these non-mailable products will not send back to the sender. The appropriate legislative authority in Canada has the right to destroy these matters. 

Criminal Code and Other Offences

If any of the above-mentioned products are found being delivered through the mail, it is considered as an offense. The following substances come under offense:

• Items those are immoral, obscene, indecent or scurrilous
• Articles relating schemes to defraud or deceive the public 
• Any article or message sent to an individual for getting money through pretenses
• Any substance relating to waging, betting, pool-setting or bookmaking 
• Any article relating to illegal lottery schemes