
Without a German bank account, many landlords won't even let you sign a lease, since rent and the deposit are expected to come from a German account. For newcomers who don't yet have a registration certificate from the citizens' office, that creates a chicken-and-egg problem, one that the right provider can solve.
Branch banks like Sparkasse, Volksbank, or Deutsche Bank generally require a registration certificate (Meldebescheinigung) from the citizens' office as proof of address when opening an account. Without that certificate, most branch banks decline to open an account, regardless of the applicant's creditworthiness otherwise.
Digital banks like N26 verify identity by video call instead, accepting a valid passport and a German delivery address for that, and even a temporary address is enough. Opening an account this way usually takes only a few minutes and requires no branch appointment, which makes it practical especially for newcomers without a fixed registered address yet.

So that opening the account doesn't fail over a missing document, have these ready:
A valid passport or EU ID card for identity verification.
A residence permit or visa if you're from outside the EU, since some banks ask for it.
An address where you reliably receive mail, such as your sublet. Your bank card arrives by post.
Details of your tax residence. Your tax identification number (Steuer-ID) is sent to you automatically by post from the Federal Central Tax Office after you first register your address.
For that registration you'll need a landlord confirmation of residence (Wohnungsgeberbestätigung). Only with it do you get the registration certificate that branch banks ask for.
If a bank turns you down, the Payment Accounts Act (Zahlungskontengesetz) helps: every consumer lawfully resident in the EU is entitled to a basic account (Basiskonto), explicitly including people without a fixed address. The bank must offer you the contract within ten business days of receiving your application. A basic account covers transfers, direct debits and card payments, which is everything you need for rent and the deposit.
A digital account without Anmeldung is a stopgap, not a substitute for later registering your address. Once you've registered with the citizens' office, you should tell your bank the new registered address too, regardless of whether it's immediately legally required. If you later want to switch to a branch bank, for example for an overdraft facility, you'll need the registration certificate for that anyway.
Our Anmeldung guide covers the deadline for registering your address itself and what follow-on costs come after, and our electricity, gas, and internet setup guide shows how those default to basic supply automatically without your own contract.
Once your account is running, you can prepare the payments around moving in. Under Section 551 of the German Civil Code (BGB), you may pay the deposit in three monthly instalments. Our guide to first month's rent and the deposit explains when each payment is due. If you want to save your start-up capital, look into a deposit guarantee bond instead of cash. If you're moving to Berlin right now, Renting in Berlin as an expat sets out the right order for your first steps, and the Waitly newsletter for Berlin tells you when new apartments or lists open.
With digital banks like N26, yes, using a passport and a German delivery address. Traditional branch banks generally require a registration certificate instead.
Usually by video call through the smartphone app, holding your passport up to the camera.
Not always legally required, but it's practical, so mail and account details match your current address.
Generally yes, it's the standard proof of address for opening an account at a traditional bank.