A Labour MP attempted to hand in a petition to the party's headquarters, calling for a second Brexit referendum, only for it to be turned away.
Angela Smith's petition, which called on the party leader, Jeremy Corbyn, to back a People's Vote, has been signed by nearly 50,000 people.
Ms Smith told ITV News MPs shouldn't be "bribed" with money for their constituencies because Brexit will cost more than the PM can offer.
Despite bringing the petition boxes which are said to carry the signatures inside them, the MP waited for more than 10 minutes and then was asked by party staff to send them an e-mail instead.
A Labour source told ITV News: "For the safety and security of staff members, the Labour Party does not accept hand-delivered petitions.
"Anyone who informs us of an intention to do so is asked to send it through electronically."
But Ms Smith insists they "were told that we could deliver the petition and hand it in at the desk."