Separate lawsuits are pending in state and federal court, one filed by same-sex couples and the other by a county official who briefly granted same-sex licenses.
Bob and Bill Sullivan are trying another tack. They married in Vermont in 2009, then moved back to Philadelphia.
They asked City Hall officials Tuesday to recognize their marriage, so they can enjoy spousal benefits such as health insurance and medical decision-making.
Register of Wills Ronald Donatucci says he is sympathetic, but must follow the law and await the court rulings.