By law, brokers must disclose any markup of more than 10 percent above the prevailing market price.

Since the late 1990's, brokers have been disclosing the payments, but only in general terms.

"I heard of one case where a buyer is suing a broker because airplanes fly over the house and the broker never disclosed it."

In some states brokers must disclose a range, typically 0%-2% of the loan amount, but not the exact amount.

Some states require the broker to disclose an estimated dollar amount, such as $2,500.

As it is, he continued, brokers file masses of paperwork but are still in the dark about what and how much to disclose.

There have also been complaints that some brokers do not disclose the risks when they sell funds.

First, the full-service broker can disclose his or her responsibilities to both parties in the transaction to make clear the scope of the broker's services.

The officials said that federal securities laws and the industry's own rules required both the brokers and the funds to disclose such conflicts of interest.

But the corporate insurance buyers, known as risk managers, say the brokers do not routinely disclose the details of the payments.