Just last December, OSHA fined a Hartford , Connecticut company $15,000.00 after a fatal forklift accident in August of 2004. 

OSHA identified insufficient forklift training as a contributing factor.  Among the violations noted in a 33-page inspectors report, were the absence of seatbelts on two forklifts, &  moving corrosive liquids without proper personal protection.  Problems were also encountered with the employer being dependent on casual labor supplied by temporary labor contractors.

Not all temporary labor companies provide forklift or other safety training—or provide assurances of safety certification..
It has been my experience that many Temporary Agencies do not spend enough time evaluating the credentials of forklift operators.  Their view is simply—If someone has a wallet card, they are qualified to drive any forklift.  That is erroneous, and does not meet OSHA forklift operator training regulations.

It has also been my experience that many employers pick someone from the warehouse and call them the “Qualified Trainer” - this type of trainer most likely has years of bad habits under their belt and cannot themselves operate a forklift properly and are ignorant of their own shortcomings they pass on.

OSHA has a strict definition of a “Qualified Trainer”, but no agency is assessing trainers. 

If a “temporary” worker provided by a labor company is operating a forklift  for you—it is your responsibility to assure their forklift operator training meets OSHA standards for your situation—including training by a qualified trainer., worksite and equipment specific.