The office

The site

The firm is located in the heart of Frankfurt am Main, the financial capital of the EU and Germany. Frankfurt am Main is home to 50 foreign consulates, including 48 consulates general. This makes Frankfurt am Main the city with the largest number of consulates general in Germany. The city has the largest number of airport passengers, train station passengers and trade fair visitors in Germany, the busiest motorway junction in Europe, the most important stock exchange in Europe and one of the largest Internet hubs in the world. This is why Frankfurt am Main is Germany's most successful gateway to the world in passenger, financial, data and freight traffic (air, rail and road).

The law firm was founded in 2017. The focus is on labor and migration law, residence law and business start-ups.

The consultations take place in German, English or Turkish. The firm uses modern technical applications, so you can receive all services from the comfort of your home or office, completely by phone, video telephony and email. Of course, you are also very welcome in our offices.

Rechtsanwalt Osman Öztas

Attorney Osman Öztas is the founder of leaves and trees | Law firm. He advises and represents companies, business people, freelancers, private individuals as well as foreign consulates, embassies and intergovernmental organizations. His main areas of activity are labor and migration law, residence law, business start-ups, citizenship law and international law.

In advising and representing companies, business people and freelancers in setting up a company and self-employed in Germany, he also advises in the areas of corporate law, labor law, industrial property rights and trademark law.

Advice is given in German, English or Turkish.

  • Since 2017

    leaves and trees | Law firm, founder and owner

  • 2018-2019

    Legal advisor at an intergovernmental organization, specializing in international law, labor law, social law, right of residence

  • 2016-2017

    US eDiscovery & Legal Tech company, project manager and head of the German office

  • 2012-2016

    EY Law (Ernst & Young Law GmbH), Eschborn, lawyer specializing in business immigration

  • 2011

    German-Malaysian Chamber of Commerce and Industry in Kuala Lumpur, trainee lawyer, main focus: company formation & investment in Germany and Malaysia, entry & residence law, labor law

  • 2009 - 2011

    Legal clerk in Frankfurt am Main and Kuala Lumpur

  • 2005 - 2009

    Fragomen, Del Rey, Bernsen & Loewy LLP, student assistant in the field of labor migration law

  • 2005 - 2008

    City of Rüsselsheim, elected district council member

  • 2003 - 2008

    Law student at Goethe University, Frankfurt am Main

  • 2002

    Abitur in Rüsselsheim


No, you don't have to! You can use almost all of the services from the comfort of your home or office. This is done by telephone, video conference, e-mail, post and fax.
You won't experience any nasty surprises here. Our costs are clear and transparent. At the beginning we will tell you what costs you can expect. When you hire us, you know right from the start what your costs will be.
Different issues, different matters, different clients ... no problem: there are different fee agreements for you. We often offer Fixed prices when it comes to matters that we advise very often and we can therefore estimate the effort well. We also offer the reward Hourly basis on, you decide how intensive the consultation should be. We offer permanent clients Consultancy contracts with flexible hourly contingents, the client knows that we keep the guaranteed time free every month to devote ourselves entirely to his affairs. We invoice new mandates for our fee in advance, so that a basis of trust can be created for a valuable service.
Pay as easily as possible and take your payments in cash, by bank transfer, direct debit or Paypal  in front.
Feel free to inquire in advance about the costs that you can expect. Use our contact form or send us an email ( Describe your concern and include your contact details so that we can clarify any queries that may arise with you.