Can some one hack your information through family group? An unknown person added me through family group then canceled the group

Someone can't add you to family sharing, you have to accept the invite. If you did accept the invite they wouldn't have access to all your photos but they could have access to some if you had shared them with the family but only as long as you were part of the family. They would never have access to your credit card. The organizer is in effect sharing their credit card.

Set up Family Sharing - Apple Support

Kristal,

OK I see what you mean, I assume that is an unknown person to you?

I am not sure what could be causing those notifications. Perhaps erroneously gave your email address instead of what they are trying to type. In any case, as noted by Virtuoso, you cannot be added to a family group unless you accept.

See If you think your Apple ID has been compromised - Apple Support. Perhaps someone has obtained your Apple ID credentials through social engineering or a hack of another site where you use the same credentials, and was trying to confirm that they have access to the account in a way they hoped might go undetected.

tt2

This is what I keep getting

The family organizer is now some other woman named Kennedy Barrett that lives near Livonia Michigan! I have changed all passwords and ids but I still get the message. So does this mean they have access to everything?

If you're still in the Family Share they will still have access to your purchases, they don't need your password for that. If you no longer want to be in that Family Share you should leave it : Leave Family Sharing - Apple Support

This just happened to me right now

Well obviously they did. I received the same message saying I was added to a family group and I did not recognize the name nor did I authorize it. A few minutes later I received an email saying I was removed. Well I want to know how I was added in the first place if supposedly you can't add without consent.

I'm afraid they can add you. I am very anal about messages, invites, friending etc. I never received an invitation for family sharing. But Kennexy Barrett is in control of mine and I can't get her off. I received a billing issue message because I was doing updates in my apps. And this is how I found out about it.. the apps won't update until I update payment.

Kristal,

"Unknown person"? "Someone"? What exactly did you notice that raised this question?