1. While it is the general rule of law that knowledge of a fact is a necessary ingredient in the application of the doctrine of waiver or estoppel, and consequently a person is not ordinarily estopped by virtue of the existence of a fact of which he has no actual or constructive knowledge (United Benevolent Society v. Freeman, 111 Ga. 355 (3), 359,
2. Policies of insurance, being prepared and written by the insurer, are to be construed strictly in favor of the insured and against the insurer. Benevolent Burial Association v. Harrison, 181 Ga. 230, 239 (
3. While great caution is necessary in applying the maxim, “expressio unius est exclusio alterius,” where an insurance association in preparing and writing a contract of insurance has provided that it shall be forfeited by non-payment of premiums when due, but where under the terms of the policy the right is reserved for the insured to reinstate the policy within a prescribed period after default, provided that payment of the reinstatement premium shall be taken as a warranty that he is in good health and will so remain for 30 days thereafter, and where the insurer, without relying upon the general rule of law with respect to estoppel, has seen proper to provide in the contract prepared by it that the receipt and retention of the particular reinstatement premium “ shall not constitute a waiver or an estoppel upon the association,” but has not provided that the receipt and retention of subsequently accruing premiums shall not so operate, the maxim that the express mention of one tiling implies the exclusion of another should be given application. Suppose an insurance policjq as this one did, provided that the acceptance of premiums would not estop the insurer from contesting the validity of the policy for two years from its issuance, would it not be plain that the insurer would be estopped from contesting
4. Nothing is here decided contrary to what was ruled by this court in Sovereign Camp W. O. W. v. Hart, 187 Ga. 304 (
5. The foregoing rulings being controlling, it is unnecessary to determine other questions raised, which might be material in the absence of a contractual provision such as here existed as to waiver and estoppel, such as, how long after a conditional reinstatement of a member an insurance association might rely on his warranty of good health; whether in accepting subsequent premiums after a forfeiture and reinstatement it became the duty of the association, as the trial judge charged in this ease, to make an investigation of the member’s health within a reasonable time, or be bound by his reinstatement; and whether the acceptance of three subsequent monthly payments after a forfeiture, without such an investigation, authorized the jury in this case to find that the defendant had not acted within a reasonable time.
6. Under the preceding rulings, the judgment of the Court of Appeals is
Affirmed.
