No tricks were used, nor was the name “Eric Holder” used.
How else would the trickster have gotten Holder's ballot handed to him if he didn't say that he was Eric Holder and give Holder's address?
The 'trickster' simply asked 'Do you have an Eric Holder'? He did not claim to be the person by than name.
Watch the video. He never says he is Eric Holder. The campaign worker gives the address.