Mr Farron, 46, has written to Mr Corbyn asking him whether or not he would compel his 229 MPs to back legislation to formally start the process of leaving the European Union.
In the letter the Liberal Democrat leader, who currently commands nine MPs in the Commons, warned Mr Corbyn that supporting the Conservatives would give a “blank cheque” to Prime Minister Theresa May in her drive for what many see as a ‘hard’ Brexit, divorcing completely from the EU bloc.
The fourth largest party in the Commons is hoping to steal some supporters from Labour by adopting a strong pro-EU stance which would keep the UK in the single market and the promise of Mrs May guaranteeing a second referendum to decide on any final negotiated Brexit deal.
Liberal Democrat leader Tim Farron (left) and Labour counterpart Jeremy Corbyn
Mr Farron said in the letter: “I am clear that the Liberal Democrats will not vote to trigger Article 50 if the public are not guaranteed a referendum on the outcome of the government’s negotiation, where people can decide to accept the deal the Government makes and leave the European Union, or reject the deal and remain within the European Union. That is a red line.”
A Liberal Democrat spokesman confirmed to Express.co.uk that Mr Farron would accept a simple majority verdict in another potential referendum, no matter how close.
In the past Mr Corbyn, 67, has stated that Labour MPs will not block legislation allowing Mrs May to trigger Article 50.
Liberal Democrat leader Tim Farron has written to his Labour counterpart Jeremy Corbyn over Brexit
There is nothing progressive about giving Theresa May a blank cheque to decide what form of Brexit she thinks is best and impose it on the country
Liberal Democrat leader Tim Farron
But he has declined to state whether that would be enforced with a three-line whip, demanding they vote for the measure should the Supreme Court rules the Prime Minister cannot trigger Article 50 without the approval of both the Commons and the Lords.
In the letter, Mr Farron wrote: "I am clear that the Liberal Democrats will not vote to trigger Article 50 if the public are not guaranteed a referendum on the outcome of the Government's negotiation, where people can decide to accept the deal the Government makes and leave the European Union, or reject the deal and remain within the European Union.
"That is a red line.
Labour leader Jeremy Corbyn
"The public needs clarity on what you will instruct your MPs to do."
He added: "There is nothing progressive about giving Theresa May a blank cheque to decide what form of Brexit she thinks is best and impose it on the country.
"So far, Labour have said they will seek to make amendments to the Bill, but have said they will not vote against it even if they do not secure key amendments – this isn't good enough.
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"If Labour believe amendments are needed then surely if they do not pass you should vote against the Bill?
"How can you vote for triggering Article 50 if it sets in train a hard Brexit that will damage our economy, cost jobs and goes against the will of those who voted Remain, and likely a large number of those who voted Leave too?"
Mr Farron also used the letter to continue his assault on the Labour Party over what he perceives as Labour’s failure to mount a serious opposition to the Tory administration.
Liberal Democrat's Tim Farron has written to Jeremy Corbyn over Article 50
He said: “Labour need to clear up once and for all where they actually stand on Article 50.
“Their rhetorical hokey cokey would be laughable if it wasn’t so serious.
“My question is this – are Labour actually planning to oppose something or just wave through the government’s plans?
Labour Party leader Jeremy Corbyn
“They are talking about greater scrutiny but they cannot actually do this any other day of the week so why should we expect it here?
“Labour MPs have a choice. They can stand up for the British people and vote with the Liberal Democrats to give the public their say on Theresa May’s deal, or they can back toxic-Corbyn in handing Theresa May a blank cheque to deliver the hard Brexit she wants.
“There is nothing progressive about this Labour opposition going missing in action. They are failing to stand up for anyone by becoming Theresa May’s cheerleaders for a Hard Brexit. Only the Liberal Democrats are fighting to keep Britain open, tolerant and united."