A spokesperson for Labour Leave said:
"The shameful press release about the murder of Jo Cox referenced in tonight's Channel 4 report was nothing to do with Labour Leave.
"It was fraudulently distributed in our name by someone who held themselves out to be part of Labour Leave, but was not.
"We absolutely did not agree with the press release, and we condemned it immediately and publically at the time as soon we heard it had been distributed in our name.
"Labour Leave cannot be held responsible for people who held themselves out to be representatives of Labour Leave without our consent.
"Labour Leave did not declare any cash donations from Leave.EU precisely because Labour Leave did not receive any cash donations from Leave.EU.
"Labour Leave worked from an office provided by Leave.EU. The office space and related costs were declared transparently as a donation in kind in the final accounts submitted to the Electoral Commission.
"We have discovered that this should have been declared in the running accounts during the campaign as well. This was an administrative error, and it is incorrect to say this was not declared at all. It was.
"For the avoidance of doubt, the Electoral Commission's investigation into Labour Leave relates only to these administrative errors about declarations being entered on the wrong forms. This investigation recently reached its conclusion, and the results will be announced shortly.
"Authorised work undertaken by people for Labour Leave was paid by Labour Leave and declared by Labour Leave. Work undertaken by people for other organisations, such as Labour GO, or independently was not our responsibility.
"Finally, to put it as clearly as possible: Labour Leave was an independent organisation, which conducted its strategy, campaigning and spending in an independent way. Any suggestions to the contrary are false."