Should I add invoice to package?

Depending on the type of order, it is sometimes necessary to add invoices when the customer is a legal entity, in which case a separate message will be displayed for the order:

If the order is placed through an eBay sales channel, no invoice needs to be added. In this case, instead of the customer's e-mail You will see the e-mail: ebay@rrr.lt, it means order is from eBay sales channel.