Certification Officer
- Official list of trade unions and their annual returns
- Official list of employers' associations and their annual returns
- Complain to the Certification Officer about a trade union or employers' association
- Certification Officer's decisions
- Apply to have a trade union added to the Certification Officer's list
- Certification Officer's annual reports
Latest from the Certification Officer
What we do
The Certification Officer is responsible for statutory functions relating to trade unions and employers’ associations.
Certification Officer works with the Department for Business and Trade.
Documents
Transparency and freedom of information releases
- Solid Trade Union: Other related Documents (PDF format)
- Solid Trade Union: Statement to Members (PDF format)
Our management

Contact Certification Officer
General enquiries
8th Floor
Windsor House
50 Victoria Street
London
SW1H 0TL
United Kingdom
Telephone
0330 109 3602
The best way to contact us now and in the future is by email.
Post sent to our previous addresses is unlikely to reach us
Make an FOI request
- Read about the Freedom of Information (FOI) Act and how to make a request.
- Check our previous releases to see if we’ve already answered your question.
- Make a new request by contacting us using the details below.
Freedom of Information requests
Certification Officer
8th Floor
Windsor House
50 Victoria Street
London
SW1H 0TL
United Kingdom
Contact Method
The best way to contact us now and in the future is by email.
Corporate information
Jobs and contracts
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