I found this thread from search the same issue.I was hopeing to find a different answer. How ever I had already unchecked the shipping box and I also went into the account and settings and under the sales reciept turned off the shipping option,  doing all the above the customers name still populates on returning and new customers. To be aware, I had these choices done towards the end of the year and the shipping option was "turned off" it has been recently that I am unable to stop the customers name from populating in the shipping box on our sales reciepts