Trinh Xuan Thanh som var en tidligere toppsjef i et oljeselskap i Vietnam hadde søkt asyl i Tyskland. Han var ettersøkt for korrupsjonsanklager og etter kidnappingen ble han ført tilbake til Vietnam og er idømt fengsel for livstid.
Myndighetene hevder at Trinh Xuan Thanh meldte seg frivillig til tross for at han risikerte dødsstraff for anklagene.
Kritikere har uttalt at anklagene er politisk motiverte mot tidligere partnere av den tidligere statsministeren Nguyen Tan Dung.
Germany jails Vietnamese man for 'Cold War' kidnapping
A Vietnamese man has been given almost four years in prison for taking part in the dramatic abduction of a businessman on the streets of Berlin last July.
A Berlin court ruled the 47-year-old was guilty of taking part in activity for Vietnamese intelligence and hiring a car for the plot.
Ex-oil executive Trinh Xuan Thanh, also Vietnamese, was seeking asylum in Germany when he was dragged into a van.
He then turned up in Vietnam and was jailed for life on corruption charges.
German prosecutors said the abduction was a "state-organised kidnapping" by Vietnam's secret service and that it was reminiscent of the Cold War.
The man on trial, identified only as Long NH, confessed to his role and received a reduced sentence of three years and 10 months. The court said he was not involved at the highest level of the plot.
What led to abduction?
Trinh Xuan Thanh had fled Vietnam when he was accused of racking up some $150m (£114m) in losses at state oil firm PetroVietnam Construction, as part of a state anti-corruption drive.
He had previously been in charge of the company and was a one-time Communist Party official.
Thanh sought political asylum in Germany, and Vietnam issued an international arrest warrant for him.
Mer informasjon:
How A Kidnapping In Berlin Could Bring Down Vietnam's FTA With Europe
A former Vietnamese oil executive was at large for months. Then he was rounded up in central Berlin.
Vietnamese businessman kidnapped in Berlin gets life in prison in Hanoi
Berlin 'kidnapping': Nowhere to run from Vietnam's anti-corruption campaign
