No bank, savings association, insurance company, or other lending institution, any of whose authorized real estate securities are insured by mortgage guaranty insurance companies, may state in any brochure, pamphlet, report, or any form of advertising that the real estate loans of the bank, savings association, insurance company, or other lending institution are “insured loans” unless the brochure, pamphlet, report, or advertising also clearly states that the loans are insured by private insurers and the names of the private insurers are given and shall not make any such statement at all unless such insurance is by an insurer authorized to write this coverage in this state.