Earlier quoted context omitted.
I am British and I moved to an EU country when Britain was still in the EU. I was surprised because unless I went to the immigration office to prove to them that I either had 'enough' (never really defined) money to support myself, or had a permanent employment contract - I would not have any state coverage for anything (health etc). The UK would of course not support my health care in a different country on a perman…
What country is this? In Portugal you only need a declaration under penalty of perjury that 1) you are employed or self-employed (no need of a permanent contract), 2) that you have enough money to support yourself and your dependents and that you have health insurance, provided such requirement applies to Portuguese citizens in your country of origin (leaving asides the students here). In particular the national law…
I don't know how important the permanent thing is or if it is tbh. Here it is not possible to claim salary-linked unemployment benefits (which on paper are actually quite generous) unless you have worked for some period of time (6 months or so in some larger period) even if you are as Finnish as can be.
The thing is, there are many 'soft' things that rely on that registration going through, eg. bank account[1], even a local-priced transport pass.
[1]A Finnish bank account here is more than a place to stash money, it's proof of your ID online to any of the nice e-government services.