Tracey Amon has asked a US federal court to force one of New York's prominent art advisors to hand over documents tied to her ex-husband's art collection — a collection she says is worth more than US$25 million.

On 7 August 2026, ARTnews reported that Amon filed a request in the US District Court for the Southern District of New York to subpoena Sanford "Sandy" Heller, who operates through entities including The Heller Group, LLC and Sanford Heller Fine Art LLC. The case is captioned Tracey Amon v. The Heller Group, LLC et al. ARTnews

Heller is a New York-based art advisor — a professional who guides collectors on what to buy, sell and hold, and often arranges private transactions away from the auction room. Amon wants him to turn over papers linked to the art collection of her former husband, Maurice Alain Amon.

The dispute is not new. It stretches back to a divorce case, Hejailan-Amon v. Amon, in which Tracey Amon (née Hejailan) and Maurice Alain Amon married in Hong Kong on 22 December 2008. Her complaint in that case focused on roughly 20 artworks she described as marital property — assets a spouse can claim a share of after a marriage ends — valued at over US$25 million. New York courts; FindLaw

Court records from 2018 detail what happened next. On or about 6 and 13 October 2015, Maurice Alain Amon, a company called Artmon Limited, and parties identified as the "Heller defendants" removed some of the artworks Amon alleged were marital property. Artmon Limited, named alongside Maurice Amon as a defendant in the New York litigation, appears to function as a vehicle for holding or managing art assets. vLex; Justia

The current court action broadens the legal pursuit beyond US borders. Amon has also pursued a court application regarding discovery — the pre-trial process of obtaining documents and evidence — in Switzerland, according to OffshoreAlert. That filing suggests at least part of the collection, or the paperwork surrounding it, may sit in Swiss jurisdictions known for art storage and freeport facilities. OffshoreAlert

None of these filings resolve the underlying question of who owns the art. They are procedural steps — efforts to gather records that Amon's side believes will show how the collection was moved, valued, and possibly sold while her divorce was under way.

Heller has not publicly responded to the subpoena request. The Heller Group and Sanford Heller Fine Art LLC are named alongside him as defendants.

For anyone watching the high-end art market, the case is a window into how collectors' marriages and their wall-fulls of art intersect — and how hard it can be to pin down who held what, and when, when millions of dollars in paintings start moving between countries, companies and advisors.