New questions are being asked about Queensland's blue card system after a convicted child sex offender spent three years working at a Police and Citizens Youth Club.
The case follows embarrassing revelations in 2011 that saw a computer glitch undermine the police screening system designed to protect children, disabled people and others from abuse.
In the latest case, convicted child sex offender Timothy Michael Miller lied to obtain a blue card to work at the Palm Island PCYC, The Townsville Bulletin reports.
Miller, 42, was jailed for six years in 1991 for having sex with a child.
On Thursday, he was fined $1500 in Townsville Magistrates Court after pleading guilty to making false declarations to obtain a blue card.
Miller fooled a Justice of the Peace by pretending he didn't have a birth certificate, saying his mother was part of the stolen generation and did not register his birth.
He told police after he was caught lying about his name and birth date that he thought blue cards were only there to protect kids from "full-on pedophiles", the newspaper reports.
Miller told the court he needed a blue card so he could work at the Palm Island radio station, located in the PCYC, in September 2009.
He was caught by the department when he had to reapply two years later and he reverted back to his real name.
Miller's defence lawyer told the court his client had done a "silly thing", but stressed there were no allegations of dealings with children.
He also noted that Miller's conviction related to an offence that happened when his client was 19 and the victim was 15.
The Department of Communities, Child Safety and Disability Services has defended screening processes in the wake of the latest case.
"It is regularly monitored to ensure its effectiveness and the government is committed to making improvements wherever possible," a spokeswoman for the department told the paper.
But child safety advocate and Bravehearts founder Hetty Johnston says it's not good enough.
"We can't tolerate that as a society. We want people to trust the blue card," she told the paper.
In 2011, police were forced to admit a computer system glitch meant employers were not alerted about staffers' criminal charges.
The glitch affected the system that runs daily scans of blue card applicants and holders, authorised to work with children; yellow card applicants and holders, who work with the disabled; and others.
If they are found to have been charged with criminal offences, their employers are immediately notified so clearances can be reviewed.
But the error meant 76 such cases - including 57 blue card applicants and holders - slipped through the cracks between May and August 2011.
After the error was detected, relevant government agencies were ordered to review all 76 cases to determine if clearances should be cancelled.
In relation to blue cards, only two cases had allegedly been involved in serious offences, and none were child-related sexual offences.