my sister who lives in usa has sent me a share cert which she wants me to sell for her. She has also written a letter which stated that she wants me to do this for her. Where is the best place for me to do this,I bank with aib is it best to do where I am known and also how will I be able to send her the money she wants it in dollars. The shares are valued about 12 thousand. I dont know that much about selling shares