TRUE OR FALSE FALSE! It does not have to be,
if you now what to expect...
Find out now Divorcing in Greece is a nightmare.
Losing a loved one is stressful by nature, dealing with their
estate is stressful by choice. Let us make it easy.
Find out how
It has never been easier to handle or
invest in Greek Real Estate.
Learn more

Fast Response Times

Our response times are among the best—within 24 to 48 hours for all types of inquiries. We will never keep you waiting.


Relationships are built on honesty and trust. Building long-term relationships is our key goal, so if you don’t have a case, we will tell you.


Ms. Kallergi’s personal experience of having lived and worked in Athens and New York allows her to better understand both cultures and be fully prepared for the difficulties presented for clients who live abroad.

Olga Kallergi main image

Welcome to our office’s website

As the founding partner of this firm, I welcome you to our website and encourage you to explore its contents. I have included general information on various issues that may be of interest to anyone in need of legal services in Greece and abroad. Our firm is among the very few in Greece that is dually licensed in Athens and in New York, and serves clients in both cities. Our international standing is one of the hallmarks of our firm, second only our reputation for exceptional client service. Thanks for taking the time to get to know us through our website. We look forward to working with you.

CEO & Founder

What We Do

Our Practice Areas

Greek Citizenship

Applying for Greek citizenship requires strict compliance with the requirements set by the Greek Nationality Code. An experienced attorney by your side can be the determining factor in the success or failure of your application.

Inheritance Law

We will handle the smooth transfer of any Estate assets in Greece and deal with all nuisances associated with an inheritance case, leaving you free of any unnecessary stress that comes from dealing with the loss of a loved one.

Real Estate Law

Are you planning to purchase, sell, gift, renovate, lease or register your property in Greece? We can help you navigate the labyrinth of Greek bureaucracy. Contact us to find out more about our services and network of professionals.

Family Law

Marital and parental disputes can prove more difficult to solve for partners of different cultural backgrounds and mentalities. We understand multi-national families and the challenges they face in custody and divorce disputes.

Tax and Financial Matters

Tax filing in Greece can be tricky, especially when dealing with a constantly shifting tax policy. Whether you have pending tax filing obligations in Greece or are simply looking to set up an online tax profile, we can help you.

Olga is one of the most professional, efficient, and personable attorneys I have ever met.    She was indispensable during my Greek citizenship application and guided me through the daunting process every step of the way—from New York to Athens and back again.  Quite frankly, I could never have done it without her.   Aside from being a wonderful and kind person, she is incredibly skilled and knowledgeable.  Her attention to detail is impeccable.   I am always amazed that her quick response time—especially since I am in New York and she is  7 hours ahead of me in Athens. Olga is simply the best – there’s no one else in Greece I’d turn to for expertise in legal matters of all kind.

  • Tina Andreadis
  • Senior Vice President of HarperCollins Publishers

I will always be indebted to Olga for sorting out a number of quite awkward legal issues to do with my Mother’s Greek estate. Somehow she was able to successfully navigate her way around the Greek system and resolve all the issues; some of them cross-border, some property related and some finance related. She is a most resourceful individual, this together with her intellectual ability and broad life experience enabled her to cut through the layers of bureaucracy that were experienced along the way. She works mainly on her own and that does give me as a client a full sense of commitment to my cause. I live in the UK and her drive to succeed as my legal agent in Greece was always re-assuring even when the going was quite tough. Even now a few years after her work was completed, I think I was very fortunate to find her to help me…….. thank you again, Olga.


Olga is a wonderful Lawyer, she is very efficient and understanding. I will also like to add, that she is very much on top of things, I really enjoyed working with her. I highly recommend her for her services. I would use her again if needed. I would also recommend her to my family and friends. Thank You for everything Olga.

  • Ann S.

I have been a client of Olga Kallergi's office over the past couple of years, and she has helped me navigate the complexities of the Greek system for applying for citizenship and also purchasing property in Greece. She is knowledgeable, responsive, and has made the process much less difficult, providing good advice and clear explanations about different options. There is absolutely no way I could have ever done it without her assistance.  I am very happy to recommend Kyria Kallergi for any of your legal needs in Greece!

  • Jeff Klapes
  • Boston, USA

I am a continuing client of Ms. Kallergi and I am very satisfied with all the work she has done for me in what, admittedly, was a case that many other lawyers refused to take due its extreme complexity. Olga has gone above and beyond the strict interpretation of her job and helped me in myriad ways to resolve my case. I'm pleased to recommend her and do so without hesitation.

  • N.S.

The exemplary legal services of Olga Kallergi have helped me and my family many times over the years. Olga is an outstanding attorney with extensive experience in legal matters in Greece.  She not only does her job well, but she truly cares about her clients and takes the time to answer questions. I highly recommend her.

  • I. Apostolides

Olga Kallergi, Esq. has represented us with the highest level of expertise, responsiveness, and thoroughness in a complex Greek immigration case. We can recommend Olga without any hesitation and feel that she is one of the best lawyers we’ve worked with.  Thank you, Olga!

  • John
Tina Andreadis
Ann S.
Jeff Klapes
I. Apostolides

Contact Us

    I consent to the use of my personal data in accordance with the Privacy Policy and Terms of Use. *

    Blog Post

    Latest Blog Post