Hi @Karen248
This sounds weird but life is weird sometimes and we do crazy **bleep** or bad things happen to us.
That being said, did she send you an email with this or use the ABB app? And what did she say apart from that she fell? Did she ask you for anything or what excatly did she communicate?
That being said I don't think you should be worried but just wait and see if she asks for anything and then assess the situation and the consider contacting ABB support.
If you have serious doubts about her identity I would probably flag her profile but not before hearing her out. If she asks for an outrages demand or refund or compensation for her "fall" I would contact ABB immidietely.
I hope it all works out! Keep us posted?