[deno]

Yes, very usual for EU companies. Make sure to blank anything sensitive. If this seems weird, consider how many places require your Social Security in US.

[ar-jan]

Not in my experience. Hetzner is the only one out of a dozen that I recall asking for ID.

[paulie_a]

It's generally finance related that requires a social security number. If a hosting provider asked they would get 123-12-1234