It is a module developed by Vauxoo that is not found in the Odoo App store, this module allows you to load an XML (electronic invoicing file previously stamped by a PAC) and generate an invoice in Odoo.

The module was developed for the loading of opening balances in the Odoo implementation, which are all those operations that we have open (customer invoices, open accounts receivable, open accounts payable, an updated inventory, etc.) in the system above so that when using Odoo we work normally and with control of these operations. Having the initial balances, you can start operating in Odoo with enough information. 

• Massive loading of XML for both purchases and sales.
  

• Processing to the corresponding newspapers in a massive way.
  

• UUID validation so as not to duplicate invoices.
  

• Creation of purchase invoice through XML associated with a purchase order.
  

Another important functionality is that it allows me to generate customer invoices, supplier invoices, or there is also the option to disable the ability to upload customer invoices and only upload supplier invoices, in this case, if Odoo is where they are going to be generating invoices to the customers there is no longer a case for this functionality to be left enabled, only as a protection measure.

Another relevant functionality is that purchase orders can be generated and, at the time of validation, Odoo enables me a functionality to attach the XML and leave it associated with the purchase order.

Will this module allow me to process large amounts of invoices? For example, 50,000 invoices in a single process.

Yes, this module allows the loading of large amounts of invoices in a single process, although the best thing to do when loading several invoices is to divide them into blocks so that performance is favorable.