The Employers' Mutual Protection Service has been in limbo for 12 months while waiting for the new privacy legislation, which went live at the start of this month.
It holds 60,000 names of people sacked for gross misconduct, and it can now be accessed by subscribers after discussions with the data protection registrar.
"Quite a lot of employers have been holding off because they didn't know how the legislation would affect their use of it," says Lodge Service, which maintains the database. "Now the situation is clear we're expecting a bit of a rush."
Candidates must be asked for permission before their names are checked on the the registrar. Details held are limited to names and the dates the people were sacked. It is then up to employers to contact each other.
The register may include the IT-er who borrowed a senior manager's car without permission - and crashed it - and one often found asleep in the toilet. All these are examples reported by recruitment firm Elan Computing.