How do you duplicate a key that says duplication prohibited?

Why do some keys say duplication prohibited?

The "do not duplicate" label on door lock keys is often used to prevent unauthorized duplication of the keys by non-authorized personnel. This is done primarily for security purposes in order to protect homeowners or businesses who share key access with different people.

How do I get a copy of a restricted key?

If you need to duplicate a restricted key, you'll need to receive permission from the owner or provide proper documentation that you are the owner of the keys. You'll need to take this permission to the original locksmith, or to a dealer that has been authorized to duplicate this key type by the original locksmith.

Can you duplicate a key that says do not duplicate at Walmart?

Wal-Mart, Home Depot and Lowe's all have self serve kiosk that allow anyone in possession of any non-restricted key (meaning open market key blanks) to walk up, put the key in the machine and duplicate them without any validation.