WorkSafe BC has put out a call for nearly three dozen private investigators to carry out undercover surveillance of workers suspected of making fraudulent injury claims.

Scott McCloy, who speaks for the agency, said it's looking for companies that can sign multi-year contracts and put up to 35 people into the field.

WorkSafe BC receives about 150,000 injury claims a year and surveillance is used in fewer than one per cent of all claims, McCloy said.

He notedthe agencydoes less surveillance than it used to. There were 641 surveillance cases in 2005, less than half the number of cases in 2002.

"Surveillance for us is always considered as a tool of last resort and is only used where there are reasonable grounds to suspect fraudulent activity is occurring and where other investigative methods would be ineffective."

He also noted that surveillance often supports a claim rather than disproving it.

All successful respondents to the bid call will have to be fully licensed, accredited and experienced, McCloy says.

Thecall for bids closes at the end of the month.