More than five million people in the UK have signed a petition calling on the government to stop Brexit by revoking Article 50. It's the most popular petition to ever have been submitted on the UK Parliament's website - and historians say it is the biggest ever petition to parliament in history.
But the government has ruled out cancelling Brexit, and rejected a previous petition for a second referendum. MP Andrea Leadsom, leader of the House of Commons, has dismissed the petition, saying it has far fewer signatories than the 17.4 million people who voted to leave the EU during the 2016 referendum.
So do petitions ever achieve anything - and is there any point in signing one?
"Petitions by themselves don't do anything, but they can be a very valuable tool for change," says Cristina Leston-Bandeira, a professor of politics at the University of Leeds, who specialises in petitions and public engagement. It all comes down to "how campaigners use the petition to put pressure on their representatives".
The petitions website Change.org says that, globally, one of its petitions secures a campaign victory ever hour. One of the campaigns it lists as a success is the 2015 petition to scrap the "tampon tax" - a sales tax on sanitary products - in the UK.
The organiser, Laura Coryton, was a student when she started the petition - and made headlines after more than 320,000 people signed up. Months later, the government said it would try to change the relevant EU law so the tax could be removed. Many retailers also cut costs on sanitary products to shoulder the cost of the tax themselves.
In March 2016, Parliament created legislation to eliminate the tampon VAT. It was expected to go into effect by April 2018 but did not do so. On the 3rd October 2018, new EU VAT rules that will allow the UK to stop taxing sanitary products were approved by the European Parliament. However they will not go into effect until January 2022 at the earliest.