No not always, why do you think some key sellers give you a scan of a key and not just the text because its from the inlay of a boxed product.
The link to the picture below was from a key seller of a game I bought. A lot of Origin ones are like this too.
https://imgur.com/d9CUbIB
Never had a scanned key, and never bought an origin game either. So have these fallen off the back of a lorry?