(a) Revocation of license. - The supervisor shall, upon 10 days' written notice to the licensee stating the contemplated action and in general the grounds therefor and upon reasonable opportunity to be heard, revoke any license issued under this chapter if he finds that:

(1) The licensee has failed to pay the annual license fee;

(2) The licensee, either knowingly or without the exercise of due care to prevent the same, has violated any provisions of this chapter or any regulation or order lawfully made pursuant to and within the authority of this chapter;

(3) Any fact or condition exists which, if it had existed or had been known to exist at the time of the original application for such license, clearly would have justified the supervisor in refusing originally to issue such license; except, that the license shall not be revoked because of convenience and advantage; or

(4) The licensee is guilty of using unreasonable collection tactics.

(b) Suspension of license. - If the supervisor finds that probable cause for revocation of any license exists and that enforcement of the chapter requires immediate suspension of such license pending investigation, he may, upon three days' written notice and a hearing, enter an order suspending such license for a period not exceeding 30 days.

(c) Records and notice. - Whenever the supervisor shall revoke or suspend a license issued pursuant to this chapter, he shall enter an order to that effect and forthwith notify the licensee of the revocation or suspension. Within five days after the entry of such an order he shall file with the bureau his findings and a summary of the evidence supporting them, and he shall forthwith deliver a copy thereof to the licensee.

(d) Surrender of license. - Any licensee may surrender any license by delivering it to the supervisor with written notice of its surrender, but such surrender shall not affect his civil or criminal liability for acts committed prior thereto.

(e) Preexisting contracts. - No revocation, suspension or surrender of any license shall impair or affect the obligation of any preexisting contract between the licensee and any borrower.

(f) Reinstatement of license. - The supervisor may reinstate suspended licenses or issue new licenses to a person whose license or licenses have been revoked if no fact or condition then exists which clearly would have justified the supervisor in refusing originally to issue such license under this chapter.

(g) Complaints of violation investigated. - The supervisor shall, upon sworn complaint of any borrower, investigate or cause to be investigated any alleged violation of this chapter.