Hi,
A social security certificate may be something that can be obtained from the Contributions Agency
Phone: 0300 200 3500.
Text Relay: 18001 0300 200 3500 (Text Relay).
Overseas: +44 191 203 7010.
Open Monday to Friday: 8am to 6pm. Closed on Saturdays, Sundays and Bank Holidays.
It is not a tax certificate, so not something we could issue.
If you are leaving the UK, you should submit a P85
Get your Income Tax right if you're leaving the UK
Thank you.