I'm in the process of purchasing an existing business via an asset purchase. I have an LLC setup that I will use to purchase the business; however, I don't understand how to change the name of my LLC so that I can operate the newly acquired business on day 1 using its current business name. Can anyone provide insight on this?

My understanding is that the current Owner will need to change the name of his business to something else in order for me to rename my LLC to that name; however, this would not take place until after Day 1, so what do I call the business during that transition period? What name do customers put on checks?

Thanks in advance.