Insurance Claim form

The claim form for my mother's life insurance was mailed to me in care of my sister after she contacted the life insurance company and informed them of my mother's death. We live in two different states and I didn't think the insurance company should have discussed the policy, let alone, mail the claim form to her address. I was told this was not ethical conduct from the insurance company. The claim could have been filed by someone other than me with all of the personal information.