A Labour councillor admitted using different signatures to help people fill in identification forms used for postal voting, an election court in Birmingham heard yesterday.
Mohammed Islam wrote his name in his normal handwriting and with capital letters when he acted as a witness, signing documents which proved the identity of voters.
Coun Islam is one of three Labour councillors in Aston who are being investigated for alleged massive postal vote fraud by the court.
The court heard yesterday that he had signed 66 declarations of identity for people registering for postal ballot papers.
Ravi Sukul, for the petitioners, accused Mr Islam of changing his signature because he did "not want the papers to be traced back" to him because he had made up some of the names of the voters.
Mr Sukul said at least one of the voters did not appear on the electoral register.
"Somebody with a suspicious mind would say that this person does not exist," said Mr Sukul.
However, Coun Islam claimed the voter had returned to Bangladesh last December after he suffered a stroke.
Coun Islam said: "On looking at these declarations, I can see that I used different witness signatures.
"At all times I have genuinely witnessed the signatures of the voters."
Mr Sukul also questioned Coun Islam over the decision to take completed postal ballots from the Labour office on Witton Lane in Aston to a warehouse on a nearby industrial estate on the eve of the 2004 elections.
Coun Islam said it was decided to take the completed postal votes to the warehouse - which has been described as a "vote-forging factory" - as Labour activists were concerned that Liberal Democrats would burgle the office.