For EEA National workers
Certificate of Registration
If you are a European Economic Area (EEA) citizen you can apply for a document to prove your rights to live in the UK as a qualifying person. You are a qualifying person if you meet one of the following:
You are working in the UK
You are studying in the UK
You are self-employed in the UK
You are self-sufficient
You are currently looking for work
You’re usually eligible for a:
Registration certificate if you’ve lived in the UK for less than 5 years
Permanent residence document if you’ve lived in the UK for 5 years (or earlier in some situations – for example, if you retired.