I ordered PDF-2-FLOW but I haven't received an invoice. When can I expect to receive one?

This is an automated translation and may therefore contain translation errors or differ from reality in details

After purchasing PDF-2-FLOW you will receive an official invoice from us on the first working day of the following month. For example, if you purchased PDF-2-FLOW on March 2, you will receive an invoice on the first business day after March 31 (April 1, 2, or 3).