Travelers has taken a rival insurer to federal court, saying its response to a Madison Avenue demolition claim came loaded with reservations.
On July 22, 2026, Travelers Indemnity Company of Connecticut sued Mesa Underwriters Specialty Insurance Company in the US District Court for the Southern District of New York. Travelers is seeking a declaratory judgment - a court ruling on who owes what - that MESA must defend and indemnify two of Travelers' insureds fully and without any reservation of rights.
The dispute grows out of a construction accident. According to the complaint, a demolition worker fell from a ladder on the 32nd floor of 520 Madison Avenue on July 2, 2025, injuring his right shoulder as he removed a shade pocket. He later sued the building's owner, 520 Madison Owners LLC, and the general contractor, Coyle Contracting Corp., in state court.
The coverage follows the contracts. The filing states that 520 Madison hired Coyle as general contractor, and Coyle hired subcontractor Dimar Services Corp. to do the demolition. The injured worker was employed by Dimar. Under a subcontract signed May 7, 2025, the complaint says Dimar was required to name Coyle and 520 Madison as additional insureds on its policy, on a primary and non-contributory basis.
That policy came from MESA. So Travelers, which insures Coyle, argues that MESA should carry the claim as the primary insurer, leaving Travelers in excess behind it. Travelers points to its own excess "other insurance" clause, which the complaint says places its coverage in excess whenever its insured is an additional insured under another policy.
The endorsement language sits at the center. The complaint says MESA's policy includes an additional insured endorsement (form CG 20 10 10 01) and a primary and non-contributory endorsement (form MUS 01 01 20128 0316) that extend blanket additional insured status to anyone Dimar agreed in a written contract to cover, for injury "caused, in whole or in part, by" Dimar's ongoing operations.
The sticking point is what happened after the claim came in. Travelers says it tendered the defense to MESA on August 12, 2025, and MESA responded on September 15, 2025 in what appeared to be an acceptance. Travelers argues it was not a full one. The complaint quotes MESA's letter as reserving "all (and waives none) of its rights under the Policy and applicable law, including the right to later raise other terms, conditions, and exclusions in the Policy as appropriate," and stating that all rights are "hereby expressly reserved." (The quoted letter refers to the insurer by its own initials, "MUSIC.")
Travelers further alleges that MESA committed only to defend, not to indemnify, that MESA intended to bring in its own defense counsel, and that it refused to reimburse the defense costs Travelers had already paid since its first tender.
Travelers is asking the court to declare Coyle and 520 Madison additional insureds under the MESA policy; to order MESA to defend and indemnify them on a primary, non-contributory basis; to place Travelers' coverage in excess; and to require MESA to repay Travelers' defense costs from August 12, 2025 onward.
For claims and coverage professionals, the case raises a familiar question: when a tender acceptance arrives packed with reservation-of-rights language, has the insurer truly accepted the tender - and who pays for the defense in the meantime. The stakes track the underlying injury claim. The complaint says the worker has asserted injuries including spine injuries, a disc herniation, torn shoulder tissue and a traumatic brain injury, and claims roughly $900 a week in lost earnings, with the amount in controversy in the underlying suit exceeding $75,000.
Travelers' claims have not been tested in court, and no judge has ruled on whether it owes the coverage Travelers is demanding. The underlying injury lawsuit likewise remains a set of allegations that has not been decided.
