Electronic Invoice Agreement
There are different standards. The EU Directive 2014/55/EU on electronic billing in public procurement states that “several global, national, regional and proprietary standards exist; … None of them prevail and most of them are not interoperable.  An electronic invoice can be defined as structured billing data that is issued in EDI (Electronic Data Interchange) or XML formats, possibly using Internet-based web forms.  These documents can be exchanged in different ways, including EDI, XML or CSV files.  They can be downloaded via emails, virtual printers, web applications or FTP sites. The company can use imaging software to collect data from PDF or paper invoices and enter it into their billing system. This streamlines the registration process and has a positive impact on sustainable development efforts. Some companies have their own internal e-accounting; However, many companies use a third-party company to implement and support e-invoicing processes and to archive data on their own servers.  Electronic billing (also known as electronic invoices) is a form of electronic billing. Electronic billing methods are used by business partners such as customers and their suppliers to provide and control transaction documents between them and to ensure that the terms of their trade agreements are met. These documents include invoices, orders, debit slips, credits, payment terms, payment instructions and transfer documents.
Since the mid-1960s, companies have begun to establish data links with their business partners to transfer documents such as invoices and orders. Inspired by the idea of a paperless office and more reliable data transmission, they developed the first EDI systems. These proprietary systems were quite efficient, but rigid. Each group of business partners seemed to have its own method of electronic data exchange. There was no standard that any trading partner could choose. In recognition of this, the Accredited Standards Committee X12, a standardization institution under the aegis of ANSI, standardized EDI processes. The result is now called EDI ANSI X12 standard.  This remained the most important way to exchange transaction data between business partners until the 1990s, when companies that offered more robust web applications for the user interface appeared. These new web-based applications had features that served both the provider and the customer. They allowed the online filing of individual invoices and downloads of EDI files, including CSV, PDF and XML formats.
These services allow providers to submit invoices to their customers for comparison and approval in a web application. Suppliers can also see the history of all invoices they have submitted to their customers without having direct access to customer systems. This is due to the fact that all transaction information is stored in the data centers of the third party that provides the billing application. This transaction information can be regulated by the debitor to control how much information the lender can see.  When invoices are digitized and transactions are made through a digital commercial network, the lender`s resources can be released to focus on more strategic activities that streamline and simplify processes. Processing PDF invoices, non-PO invoices and invoices for complex services can be automated and contactless. And by applying business rules, complying with purchasing rules and contracts, as well as a greater ability to register requirements, you`ll find added value with electronic invoice processing, which reduces costs and increases productivity.