City firm DJ Freeman is suing members of Lloyd's of London syndicate, Poland Names Association, alleging unpaid legal bills of £256,000.
The practice has issued a High Court writ naming James Crowley and Malcolm Milton as officers of the committee of Poland Names.
They are being sued individually and as representatives of all the members of the association.
The writ claims the money is owed for legal services provided to the association and disbursements incurred by the firm in connection with claims over losses made by the names as members of Lloyd's syndicates.
According to the writ, the association was sent invoices for a total of £516,473.53, but so far has paid only half of this sum. DJ Freeman is now claiming interest of £11,693.66 and continuing interest of £56.09 a day.
The firm's senior partner Colin Joseph said the amount of the outstanding fees was still in dispute.
"We have some outstanding bills which we are just trying to get paid," he added.