Agraded collector's cardis a trading card (e.g. Pokémon, sports cards, or Magic: The Gathering) that has been sent to an independent company to:

1. Verified– check that the card is authentic.
   
2. Assessed in condition– experts examine the card's surface, corners, edges and centering.
   
3. Rated– the card is given a numerical rating (often on a scale of 1–10, where 10 means "almost perfect condition").
   
4. Sealed– the card is encased in a hard plastic container (“slab”) with a label showing the rating, serial number and information about the card.
   

The aim is to provide aobjective quality assessmentthat buyers and sellers can trust. A graded card is therefore more difficult to manipulate, easier to value and often more valuable than an ungraded card in the same condition.

PSA - Professional Sports Authenticator

PSA – Professional Sports Authenticator is the world’s most well-known and trusted trading card grading and authentication company. Since its inception in 1991, PSA has set the industry standard for how cards are assessed, protected and valued.

RaukCard

RaukCard is Sweden's first and largest company in grading collectible photos.
The company offers professional assessment, authentication and card encapsulation, and has graded over 20,000 items since its inception.
With a focus on security and quality, they are the leading player in Sweden for both collectors and sellers.