Olive Avenue LLC is an estate planning law firm based in Chicago, Illinois. Hallie Ritzu has experience advising clients on the design and drafting of estate planning documents, including wills, revocable and irrevocable trusts (including charitable trusts), family limited partnerships, shareholder agreements, and intra-family sale agreements. She has also prepared estate and gift tax returns and have negotiated settlements with the IRS on audited estate and gift tax returns. In addition, she has counseled clients in estate, trust, and guardianship administration and have represented clients in contested estate and trust matters before federal and state courts in several jurisdictions, including in federal and state appellate courts, and in alternative dispute resolution. Attorney Advertising. Prior results do not guarantee a similar outcome.