Is it possible to attend the visa interview without a WG/dorm contract?

Yes, you can apply — The German consulate requires an address declaration for student visa applications, but a binding rental agreement is not mandatory. The important thing is to claim "you have a place to stay in Germany."

#Accepted Document Types

1. Wohnungsgeberbestätigung (landlord's confirmation) — the strongest.
2. Vorvertrag (pre-contract) — if signed by the WG owner.
3. Studierendenwerk place confirmation — waiting list confirmation letter.
4. AirBnB / hostel reservation — for the first 1-2 months.
5. Relative/acquaintance's commitment — if you have a relative in Germany, an address declaration from them.

#Consular Practices

• Istanbul/Ankara: Temporary accommodation documents (1-2 months AirBnB) are accepted.
• Some consulates outside Türkiye: May request a binding rental agreement.
• Risk: If the address seems uncertain, the officer might ask "your intention to return to your home country is questioned" — prepare a clear answer.

#Practical Strategy

1. Make an AirBnB/hostel reservation for the first 2 months (cancellable type).
2. After getting your visa and arriving in Germany, look for a WG.
3. Once a WG contract is signed, obtain a Wohnungsgeberbestätigung for Anmeldung.

Related: Is a dormitory sufficient for Anmeldung | Temporary accommodation.