Kayne Burrell, 27, was working at Green Valley Funeral Services when he helped Lee Cruz-Parry, 43, break into Green Valley Funeral Services in Governor’s Cottage Camp.
Once inside, then men stole a safe containing £2,500 in cash and personal documents, as well as an iMac computer.
The two would-be robbers were spotted by a passer-by, as well as caught on CCTV.
Cruz-Parry, who has a record littered with similar offences, committed the offence while on bail, and was arrested after Burrell turned himself in.
Despite both men being arrested, the money was never recovered, and Cruz-Parry told officers he had thrown the iMac into the sea.
After both men admitted the offence of burglary, the Chief Justice handed Burrell four months in prison, and Cruz-Parry a sentence of eight months.