Real Testimonials

  • Mr. Seidner’s tireless efforts, research and dedication to us is to be commended. He and his staff are dedicated, loyal, highly experienced and extremely patient.
  • Within minutes of meeting Mr. Seidner I had hope for the first time in months. His caring ways made you feel like family.
  • I am extremely touched by the fact that you saw how emotional and upset I was and you took the time to be very sensitive to my needs and concerns. You kept me calm and with your hard work and great efforts you accomplished the next to impossible!
  • Seidner & Associates was a breath of fresh air after meeting with many other attorneys who were unsatisfactory.
  • He guided me every step of the way without ever feeling lost, he made me aware of his every move and never once gave me false hope. His work ethic is great, non-judgmental, diligent, compassionate and caring; he is the true definition of an advocate.
  • I felt very confident that my matter was being handled with the utmost dedication and professionalism.
  • If you want to win and see the light at the end, Matthew Seidner is the attorney to hire.
  • You know that you are in extremely good hands when you come here. That gives us a feeling of security and peace of mind.
  • I have 2 children. Matt made sure that my children and I were taken care of. He is an attorney that truly cares, especially in cases that involve children.
  • You feel like one of the family there and know you are taken care of.

Recent Activity

  • The firm negotiated a custody settlement today, the terms of which were placed on the record and so-Ordered by the Court.  The agreement awards joint legal custody to the parties and sole residential custody to our client.  A parenting time schedule was negotiated based on the opposing party’s complex work schedule.  The Court complimented our [...]
  • On the eve of the scheduled custody hearing, the firm learned of a possible conflict by the forensic evaluator due to prior communications with the adversary.  The firm immediately contacted the Court and provided the requested documentation with respect to the conflict.  The Court granted the firm’s request for a stay of the custody trial [...]
  • The Nassau County Family Court signed the firm's proposed Final Order of Custody, maintaining sole legal and residential custody in favor of our client and modifying it such that our client receives weekend time with the child.  The Order also implements a comprehensive holiday schedule which the firm negotiated at length with the adversary.
  • After finalizing the terms of a litigious divorce, the firm submitted the final paperwork to the Court.  The terms of the divorce judgment will grant our client sole custody of the parties' three children and child support which deviates from the Child Support Standards Act in our client's favor.
  • In an attempt to make the divorce process as quick and painless as possible, our client sought an uncontested divorce in Nassau County. Although the parties thought they agreed on everything, it became apparent that the parties still had several issues that were not yet agreed upon. After many hours of negotiation and multiple revisions [...]
  • In a global settlement of a multi-year, contentious case in Nassau Family Court, rather than go to jail today for willfully violating an order of child support, a deal was reached to pay arrears in a short period of time and permit the mother to relocate to North Carolina with her child and new husband.  [...]
  • Firm appealed a decision from the Nassau County Family Court which disqualified our firm as our client's counsel and obtained a Temporary Stay that same day. Today our firm was informed that the stay would be permanent, which will allow us to remain our client's counsel.
  • Today the firm appeared in Nassau County Family Court to defend our client against a Violation Petition. After bringing to the Court's attention that the petitioner had filed eight prior baseless petitions within the last year, the Court decided that the instant petition should be dismissed with prejudice.

“Successful Because We Care”
- Seidner & Associates P.C.

long-island-family-lawyer-quote-greenIf you’ve come to our website, you probably have some concerns or maybe just a few questions. Our team is here to help you un-complicate your life when you need it the most.

It’s no secret that Elder, Family and Divorce law are very personal, emotional subjects that can be difficult for families to navigate. After all, it often means major changes in family dynamics and finances.

Finding a New York family/divorce/elder law firm is easy. The real challenge is finding the right group of professionals who can provide sensitive representation that’s thorough, effective, and fair at an overwhelming and emotional time. Often, a case is not simply determined by how bright or forceful the lawyer is, but by how much respect they have within the courts and with other lawyers.

Seidner & Associates, PC, understands the intimacy and complications associated with family matters. Our committed Long Island attorneys will work to ensure your family’s needs are met. Whether you are facing a divorce, a child custody dispute, or estate planning project, you need a law firm that truly cares and has a proven track record of success.

Our only focus is on elder, family and divorce law. We don’t handle anything else; not criminal law, not corporate/business law, not personal injury, or any other area. Our focus and experience maximize your chances of getting the desired results.


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(516) 345-9900

Opening Hours

9:00am – 6:00pm
9:00am – 6:00pm
9:00am – 6:00pm
9:00am – 6:00pm
9:00am – 6:00pm
By Appointment Only
By Appointment Only

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consult-buttoon-marroonYou are invited to contact our team of exceptional attorneys for a complimentary consultation today. We will always be honest with you and tell you what we think we can accomplish together. There is a major advantage to choosing a lawyer that is familiar with our courts and respected inside the building. We look forward to showing you the benefits of working with our extraordinary team.

Awards and Accreditations

We are proud of the awards and recognition we have recieved for our work.  Our firm holds itself to the highest standards possible and treat every single client as if they were our own family