The agents and brokers, who must be licensed to place surplus lines business in that state, might be required to certify that a specified number (often two or three ) of licensed insurers have refused to provide the coverage. In some states, agents and brokers must provide letters from the insurers rejecting the coverage. Some state insurance departments maintain lists of coverages that are eligible for surplus lines treatment without first being rejected by licensed insurers. Some states also maintain lists of eligible surplus lines insurers, requiring producers to place business only with financially sound insurers.