The discovery, made over the weekend, prompted Bullion Reserve to file a bankruptcy petition Monday in Los Angeles, seeking court protection from its creditors.

Patrick Lynch, president of the Salt Lake City company, said that in the three years he had stored bullion for Mr. Saxon, the most he had ever seen in the vaults was about $3 million. He said it was standard practice for his company to register the bars by their serial numbers.

A Brinks executive in Los Angeles said he had been advised by his lawyers not to comment.

Where the millions of dollars in customers' money went is unclear.

Robert Abrams, Attorney General of New York, said his office had been flooded with calls about the company. His office has been investigating Bullion Reserve, which advertised heavily in the New York area, for several weeks, and the investigation is continuing.

There were reports from Mr. Abrams's office that Mr. Saxon, his wife and others closely identified with the gold dealer had received $41 million in loans from the company. And the auditors' report said ''millions of dollars'' in loans had been made to Mr. Saxon. But a laywer retained by the company said he had no such informa tion.Lawsuits have been filed seeking to recover $23 million in cash, jewelry and other assets from the company. The largest seeks to seize $16.4 million in assets, including three luxury cars and two condominiums owned by Mr. Saxon's wife and his estate.