Three Devon and Cornwall Police dogs have just completed a training course to enable them sniff out large sums of hidden money.
The force's nine other dogs could also be trained
They have been working in South Wales to find cash being smuggled through the South West's main airports and ports.
They are also able to locate hidden money during raids on properties.
Tony Jordan, head of the force's dog unit said: "When the dogs pick up the scent they sit where the money is hidden or bark."
The Bank of England provided large sums of bank notes so that the dogs could be trained to smell money.
"(During training)...the bank notes were hidden in buildings and in containers underground<" said Mr Jordan.
If the three dogs prove successful in detecting money, the force's nine other sniffer dogs could also be trained in the skill.
Mr Jordan said: "The force will be allowed to keep up to 30% of the criminals' money the dogs find.
"This will be re-invested in policing, so the dogs are income-generating and will easily pay for themselves."
The force's sniffer dogs are called to about 1,000 incidents a year.