DUOLEXX

Deutsch ↔ English

Rent guarantee in German and English — both in one document

For the cross-border case in Germany: one document, the binding German version and a English translation side by side.

35+ document typesEU hostingcryptographically sealed

In ~5 minutes

to a signature-ready PDF

€14.90

one-off per document · blank template €9.90 · preview without sign-up

Instead of several hundred €

for a lawyer plus certified translation

Not one language per country — both sides read the same binding version

Template shops give you a German-only or English-only version. DUOLEXX generates both in a single document, grounded in Germany tenancy law — guarantor understands exactly what they sign and it stays enforceable in Germany.

Governing Language Version

This document consists of two language versions. In the event of any discrepancy or question of interpretation, the version in the governing legal language (Deutsch) shall prevail; the English version is a translation provided for convenience.

Frequently asked questions

How high may the rental security be in total?
The cash deposit is capped at three months' net cold rent, and any arrangement that deviates to the tenant's disadvantage is void — § 551 Abs. 1 and Abs. 4 BGB.
Does a rent guarantee have to be in writing?
Yes. A suretyship such as a Mietbürgschaft is valid only if the surety's declaration is issued in written form — § 766 S. 1 BGB.
When can the landlord terminate the lease over unpaid rent?
If the tenant is in default for two consecutive due dates, the landlord may terminate without notice — § 543 Abs. 2 S. 1 Nr. 3 lit. a BGB.
Can I pay the deposit in installments?
Yes. The tenant is entitled to pay the deposit in three equal monthly installments, the first due at the start of the tenancy — § 551 Abs. 2 BGB.
What happens to the interest on the deposit?
The cash deposit must be kept in an interest-bearing account separate from the landlord's assets, and the interest accrues to the tenant — § 551 Abs. 3 BGB.

Why DUOLEXX instead of just asking an AI?

An AI writes text fast. That doesn't make it legally sound, bilingual and ready to sign. That's exactly the difference.

Grounded in local law

Every document follows the law of the chosen country — researched clauses, not a generic template from the web.

Authoritative language + translation

The binding version in the legal language, alongside an understandable translation. A chat rarely delivers both, soundly, at once.

Verifiable signature

Two-party signature with a SHA-256 integrity proof — provable that both signed the same wording.

Finished, not just text

PDF, signature, archive and share link in one flow — an AI chat only hands back raw text.

1

Choose a template

Choose a region and document type — every template follows local law.

2

Answer questions

Simple questions instead of legalese — your document builds live in two languages.

3

Unlock the PDF

Pay once and you're done: download, archive and share your PDF.

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