Vincent Kruw Mapham, 33, was on Thursday sentenced to 18 months' jail after pleading guilty in the ACT Supreme Court to aiding and abetting unlawful confinement.

Justice John Burns released Mapham on a suspended sentence as he had already spent more than a month in jail.

The court heard that Mapham and another man confronted the woman at her Dunlop home in January 2011 and demanded money. When the victim said she did not have any cash in the house, the co-offender, who has already been sentenced for the incident, threatened her with a knife and forced her into their car.

Mapham activated the car's child lock system so the woman could not escape. The hostage was then driven around the Belconnen area while she phoned her father and organised for him to collect the ransom.

She was released when her father handed over $1500 in cash at the Bonython shops.

Justice Burns noted Mapham had a history of drug abuse, which started when he was 15 years old and included experimentation with amphetamines and ice.

The South African-born man had had a promising rugby career, which was cut short by an injury at age 22.

The judge sentenced Mapham to 18 months' jail, backdated to take into account time spent in custody.

He was also ordered to enter a two-year good behaviour order and accept supervision.

Justice Burns also resentenced Mapham on three charges of producing and using counterfeit money.

In 2008, Mapham tried to use counterfeit notes to buy cigarettes and other items.

Police raided the man's home soon after and seized two computer printers, white nail polish, photographic paper, and small silver and white stars.

They found images of scanned $50 notes on a USB thumb drive, including one that matched the note used at the service station.

In 2009, Mapham was given two years' jail, to be suspended after nine months of periodic detention.

But a back injury, after he slipped and fell on wet tiles, meant he could not complete the sentence.

Justice Burns reimposed the original sentence, but suspended it on the condition the defendant pay a $1000 surety.