This route does not begin with a form but with a question that governs everything that follows: does your guest need a visa for the visit at all?
Because the formal obligation is not a ritual of hospitality — it is a building block of the visa procedure. Where no visa is applied for, it is generally not needed either, and with it fall away the office appointment, the fee, and a liability that runs five years.
What determines the answer
What counts is your guest’s nationality, not their country of residence and not your status in Germany. A Ukrainian national with a biometric passport enters visa-free even after years of living in a visa-required country.
For short stays of up to 90 days in any 180, the entry conditions of Article 6 of Regulation (EU) 2016/399 apply: a valid travel document, a visa only where prescribed, evidence of the purpose and conditions of the stay, sufficient means of subsistence, and no SIS alert.