An overwhelming majority of landlords believe Client Money Protection insurance should be made compulsory for letting agents, according to a small snapshot of the industry.
The survey, of 387 landlords, was carried out by Total Landlord Insurance.
Of the 85% of landlords who responded and said they use a letting agent, 81% believe CMP should be mandatory.
The Government has been conducting an industry-wide consultation on the issue.
Mandatory CMP could be made compulsory through the Housing and Planning Act 2016.
Industry estimates suggest UK letting agents hold approximately £2.7bn in client funds.