After the death of a testator, a person having custody of his will shall deliver the instrument to the register for the county in which administration should be had pursuant to § 5-103. The custodian may inform an interested person of the contents of the will. A custodian who willfully fails or refuses to deliver a will to the register after being informed of the death of the testator is liable to a person aggrieved for the damages sustained by reason of the failure or refusal.