In the UK, employers are required to set up a workplace pension. You must also complete a Declaration of Compliance within 5 months of setting up such a scheme, to declare that your workplace pension has been executed correctly and in line with legal obligations.
If you have any queries about this, it is vital to contact the Pension Regulator. They can offer advice on your current workplace pension, or, if you're setting up a new scheme, on what exactly is required to be compliant.
For example - if you have a UK company, and you have not paid your employees' pensions thus far, you could be liable to penalties for this. The Pension regulator can walk you through exactly what's necessary to rectify this.