A few weeks back I was on the receiving end of a similar situation. All I can say is that when I received a notice that my items were on their way I was confused. I immediately thought that the shop owner had made a mistake and was sending a duplicate item, so, thinking I was doing her a favor, I contacted her. She seemed to take it very lightly and said it was all right, she hoped I was enjoying the item I already received. No explanation or apology. I do not remember her words, but it was done in such a manner, that for some reason I felt put off. I know I will not visit her shop again.
I must add that I am not picky, I have had shops send me the wrong item, I have had shops delay shipping, etc., etc., but they have always been gracious and explained the mishap. I continue to go back to those shops.
So, maybe it would be a good idea to let your customer know before hand that she will receive a notice about her item being shipped to her. I know I would have appreciated being notified before hand.
Good luck to you.
