Shadow Home Secretary Yvette Cooper paid tribute to Malcolm Wicks at the time of his death.
Malcolm Wicks lost his battle with cancer in September, aged 65. He had been an MP for Croydon North for two decades. Voters not registered will have until the 14th November to do so, as the by-election is on 29th November.
Voters will go to the polls on November 29 in Croydon North, to fill a vacancy created by the death of Labour MP Malcolm Wicks.
Labour had a comfortable majority in this seat at the 2010 general election.
Former minister Mr Wicks held Croydon North with a 16,483 majority.
Tributes have poured in for the Croydon MP Malcolm Wicks who has died.
Mr Wicks, who represented the constituency of Croydon North, had been fighting cancer for some time.
On Sunday, colleagues from both sides of the political divide paid tribute to him.
Piers Hopkirk reports: