My Best Friend's Wedding - S3-E22
Audio problem: If you look at the band's mouthes in the back round, they are completely out of sync with the song for a verse. (00:19:05)
My Best Friend's Wedding - S3-E22
Continuity mistake: As JD and Turk are walking away from the camera as they are playing the golf game in the hospital car park, Turk is wearing a white visor in the front shot, but not in the behind shot. It's not hidden behind JD's arm either.
My Best Friend's Wedding - S3-E22
Continuity mistake: Despite being made "Co-Best Man" in "My Porcelain God", Turk's brother is nowhere to be seen throughout the entire wedding.
Answer: No, it was a fake, they used a stamp.
It is real.