Upon the occurrence of the risk insured against, the burial society shall be obligated to the beneficiary for payment of the claim unless the contract is invalid because of fraud or other reason. This indebtedness shall be a lien upon all the property, effects and bills receivable of the society. This indebtedness shall have priority over all future incurred indebtedness, except as provided in this chapter in the case of the distribution of assets of an insolvent corporation, and as to rights of third parties.