International Underwriting Association (IUA) members are submitting market placing slips to a voluntary audit in an effort to boost London's business process reform programme.
The IUA said 20 companies had submitted London Market Principles slips to the Lloyd's business process reform team for audit.
The aim, said the IUA, is to raise standards in the use of the market slip and improve business models.
The Lloyd's business process reform team will check the slips, summarise the results in a monthly report and give feedback to individual firms and the market, the IUA said.