You do not need proof of funds. You do not need a letter of invitation. You do not need anyone to look after you. You do not need proof of accommodation.
You need to prove only that:
- You are an EU or Swiss citizen or a national of an EEA country. Your Portuguese passport does this.
- Your relationship qualifies (the term of art is "durable relationship").
Proving the second element is more difficult. The guidance on extended family members says:
Evidence required for durable partners
A durable relationship is an unmarried partnership which has normally continued for 2 years or more. The evidence the applicant can provide may include:
- proof that any previous relationship has permanently broken down, for example a:
- decree absolute for marriages
- dissolution order for civil partnerships
- evidence of cohabitation for 2 years, for example:
- bank statements or utility bills in joint names at the same address
- rent agreements
- mortgage payments
- official correspondence which links them at the same address
- evidence of joint finances, joint business ventures and joint commitments, for example:
- tax returns
- business contracts
- evidence of joint responsibility for children such as:
- a birth certificate or custody agreement showing they are cohabiting and sharing responsibility for children
- photographs of the couple
- other evidence demonstrating their commitment and relationship
You must always consider the individual circumstances of the application. For example there may be instances when the couple have not been in a relationship for 2 years or more, but you are still satisfied that the relationship is subsisting and durable. This may be, for example, where the couple have a child together and a birth certificate showing shared parentage has been provided with evidence of living together.
You must refer to a senior caseworker if you doubt whether the level of evidence provided is enough to demonstrate a durable relationship exists. If the applicant has provided enough evidence and you are satisfied that the documents are genuine, you must consider whether the requirements of regulation 8 (extended family member) of the Immigration (European Economic Area) Regulations 2016 (the 2016 regulations) have been met before you go to stage 3.