Home » Support » Online manual » Instructions for invoicing Instructions: Invoicing Browse articles Sending sales invoices using email With Apix you can send invoices using email. Read what to consider when sending sales invoices using email. Read more Receiving invoices by email Do you want to receive invoices by email through Apix? See what the invoice sender needs to consider when sending invoices by email. Read more Active e-invoicing for consumers (B2C) The B2C e-invoicing agreement enable electronic billing for consumer customers through online banking. Read opening instructions for Apix. Read more