The Employment Tribunal Penalty Enforcement and Naming Scheme was set up by the Conservative government in 2016, after a 2013 survey of 1,200 claimants found that more than a third hadn't received any money at all.
Under the free scheme, companies face a penalty if they don't pay within 28 days, and since 2018 they can also be named online by the government.
But of around 7,000 people who have used the scheme, more than 5,000 did not receive their payment or settlement, data from a Freedom of Information request suggests.
The data indicates that despite more than 4,800 penalties being issued, with a combined value of more than £9m, the government only recorded 109 as being paid.
It also suggests not a single employer has so far been named by the government for non-payment, despite nearly 4,000 requests being made.
