User shoud have invoice when they buy credits

Hi there, i 've just starting to test buy/sell credit with RSDirectory, but it seem that there are some missing regarding the sell process :
as you know in EU zone, sell something should correspond to a certain standard the minimum to provide to a customer is an invoice (PDF), more over you should provide important informations about your company (https://bit.ly/2MRGsMe).

But i did'nt see it nowhere in RSdirectory, so i'dlike to suggest you to intagrated such solution in RSdirectory or as i said in a previous post, to develop a plugin that to allow to sell credits with a cart plugin such as J2store.
Regards