Can someone get by with sending you an email promising to transfer funds into your account and get your and your sister's information and then not transfer the funds?
I don't know if they can get by with this or not, but if it's
the type of emails I'm thinking about, they provided a great story
about someone dying and leaving a bunch of money that they want to
give to you. Whatever information you and your sister provided to
them will most likely be used to steal money from your accounts.
You need to contact every institution that you gave information
about and let them know what the situtation is. DO IT NOW!