My Old Man - S1-E19
Continuity mistake: When the Janitor's dad tells him to drop and give him 30, the Janitor throws his mop and it lands to the floor. But in the next shot it's standing up in the mop-bucket. (00:13:10)
My Old Man - S1-E19
Continuity mistake: When JD's Dad arrives at the apartment, and sits down to drink a beer, from straight on his jacket is open and his tie is draped to the right. When the shot cuts to a view from the side, his jacket is now open much less, and the tie hangs straight down his shirt.
My Old Man - S1-E19
Continuity mistake: When J.D. and his Dad are sitting in the canteen, as J.D. says "But Dad, you sell office supplies," a bottle of water suddenly appears on the table between shots. (00:10:25)
My Old Man - S1-E19
Continuity mistake: Towards the end of the episode when JD and Dr Cox are talking on the ward, JD's stethoscope jumps between shots from behind his name tag, to in front, and back again.
Answer: No, it was a fake, they used a stamp.
It is real.