Ehh.....more trouble than I am willing to go thru for someone who hasn't contacted me in more than 20+ years. Tho I feel for their loss the connection just isn't there anymore.PM her and explain who you are and that you'd like to send a condolence card and see if she'll give you a mailing address. By using FB she can check out you and your contacts if you have that open for her to see and she can verify your identity before giving out the address. Just a thought.