Irish police have received an international award for their search for the country's worst motorist.
Earlier this year it emerged that officers had issued 50 driving tickets to a Mr Prawo Jazdy, which is Polish for "driving licence".
At the Ig Nobel ceremony in the US the force topped the literature category.
The prize was accepted by Karolina Lewestam, "a Polish citizen and holder of a Polish driver's licence", who is a graduate student at Boston University.
She "expressed her good wishes to the Irish police service".
The aim of the Ig Nobel awards is to honour achievements that "first make people laugh and then make them think". It is organised by the magazine Annals of Improbable Research.
Designers of a bra that turns into gas masks and a team who found that named cows produce more milk were among the other award winners.
Irish police had to send out a memo to officers in the force explaining what was behind the repeat offender.
"Prawo Jazdy is actually the Polish for driving licence and not the first and surname on the licence," read a letter from June 2007 from an officer working within the Garda's traffic division.
"Having noticed this, I decided to check and see how many times officers have made this mistake.
"It is quite embarrassing to see that the system has created Prawo Jazdy as a person with over 50 identities."
The officer added that the "mistake" needed to be rectified immediately and asked that a memo be circulated throughout the force.