Always use original chargers.
“If the product you own is identified as counterfeit, you will not be able to use the services provided by Samsung Electronics and it will be difficult to validate the warranty for damage caused by the use of a counterfeit product.“, can be read on the website.

The country of manufacture must appear correctly.
Samsung official website

There should be spaces between the words.
Samsung official website
You can use the Lightning connector, USB connector, and laser-etched markings to identify counterfeit or uncertified chargers that appear to be from Apple. We show you some examples provided by the official Apple page.

Examples of the original chargers (left) versus examples of fake chargers (right).
Apple official page

Examples of the original chargers (left) versus examples of fake chargers (right).
Apple official page