Chances are low that they've checked the ghost's driving licence or some other ID, maybe they've seen the well-known face?
The ghost of King Hamlet disturbs the watch of the Elsinore guards.
The soldiers want to tell about the ghost to scare you.
The ghost of Hamlet's father appears to some guards. The guards tell Hamlet who says he will go watch for the ghost. Laertes, son of Polonius, embarks for France. Polonius tells his daughter Ophelia, who has been flirting with Hamlet (or maybe more, it's not clear), to give him the cold shoulder. The ghost appears to Hamlet, gets him alone and tells him that he was murdered by Hamlet's uncle and the current king, Claudius. Hamlet swears to revenge him then swears the guards to secrecy.
It would be normal to have a guard on the king's palace anywhere at any time. But you may be alluding to the fact that a ghost of the dead King Hamlet appears on the battlements every night.
He's a guard, watching the battlements of Elsinore castle to see if the Norwegians are going to invade. He is one of the guards who sees the ghost of King Hamlet in Act 1 Scene 1.
If we talk about the ghost ,it was Hamlet's father King Hamlet's ghost and it appears four times throughout the play.
Sort of spiritual and ectoplasmic. He was a ghost, after all.
No, the ghost instructs Hamlet to seek revenge on his uncle, King Claudius, for murdering him and usurping the throne. The ghost does not mention punishing Gertrude, Hamlet's mother.
The ghost of Hamlet's father, the former king.
Hamlet's father was King, but then killed by Hamlet's uncle. Hamlet's mom then married the King's brother. Hamlet was visited by his father's ghost, and as a result wanted to expose the killer of his father.
Marcellus and Barnardo
when hamlet saw his father's ghost, the ghost said that hamlet's uncle (which he was king during that time) put poison in hamlet's father's ear while he was sleeping so he could become king. so it was hamlet's uncle