Immigrationboards.com

Documents you must provide
You must provide:

a valid passport
evidence of your relationship to your EEA family member, for example a marriage certificate, civil partnership certificate, birth certificate or proof that you’ve lived together for 2 years if unmarried
your family member’s valid passport or national identity card (or a certified copy if you cannot provide the original)
proof of your dependency if you’re dependent on your EEA family member
If your EEA family member has been in the UK for more than 3 months, you must show that they have a permanent residence document or are one of the following:

working, for example an employment contract, wage slips or a letter from an employer
self-employed (for example contracts, invoices or audited accounts with bank statements) and paying tax and National Insurance
studying, for example a letter from the school, college or university
financially independent, for example bank statements
Your family member must have full health insurance (comprehensive sickness insurance) if they’re studying or financially independent.

You’ll need to provide a certified translation of any documents that are not in English or Welsh.