question re: psa/dna at shows

what does it mean exactly when it states that "psa/dna autograph experts will be on-site to authenticate your previously signed items"? does this mean they will encapsulate the card or that they just slap some sticker on it?
thanks. eyebone
thanks. eyebone
"I'm not saying I'm the best manager in the world, but I'm in the top one." Brian Clough
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Sean
Always Looking for vintage hockey autographs
The Broderick Collection