Bundles of fake bank notes were found hidden in bushes at a historic Lancashire hall.
Two men who had counterfeit notes on them were arrested at the scene.
Double killer Stephen Bosanko, 32, and Francis Finch, 41, have each pleaded guilty to possession of a single counterfeit £5 note.
On December 12, police followed a car driven by Finch and carrying Bosanko as a passenger, as both men were wanted on warrant in relation to theft from gaming machines, Preston Crown Court heard.
The car pulled in to Salmesbury Hall but when officers approached the vehicle, Bosanko was standing nearby “making as if to urinate”.
Suspecting something was amiss, police searched the surrounding area and found bundles of fake £5 notes, partially concealed by bushes. Another note was found in the door pocket of the car and following their arrests on warrant, Bosanko and Finch were each found to have a counterfeit note on them. Finch, of Downing Street, Preston, denied all knowledge of the fraudulent notes which were found in the bushes at Samlesbury Hall.
However he admitted he knew Bosanko had some counterfeit currency as he had seen it on another occasion.
Bosanko, who is currently serving a prison sentence for burglary, pleaded guilty to having a counterfeit currency note at Preston Crown Court.
Bosanko was convicted of manslaughter for a 1999 attack and then of death by dangerous driving in 2003.
Finch admitted having a counterfeit note in his custody or control on the day he was due to stand trial at Preston Crown Court. Both men will be sentenced on October 18. Recorder Mukhtar Hussein QC, ordered a pre-sentence report for Finch and asked that a recent report in respect of Bosanko be updated.
He warned Finch: “By ordering a report and granting you bail, you must not in any way infer that any particular sentence is in the court’s mind.”