Creating a customized e-invoice is easy if you know how and with whom

Dec 15, 2025 | Uncategorized

High regulation and globalization have made personalized e-invoicing a strategic requirement. For a CFO of a large multinational company, being able to issue and receive e-invoices adapted to multiple formats, regulations, and needs reduces errors and operational costs. It also provides tax protection and improves the customer and supplier experience. How? In this article, we explore why customization in large-scale invoicing is critical, how a platform like easyap solves it, and when it’s beneficial to choose our solution. Furthermore, we provide examples and a comparison to evaluate providers.

Why are personalized e-invoices gaining such importance in large enterprises?

Most large companies we know operate in many countries or industries with different requirements, languages, currencies, and formats. Therefore, for them, personalized e-invoicing is a fundamental tool because:

  • Complies with local regulations (electronic seal, structured formats, mandatory tax fields…).
  • Ensures accounting consistency by mapping fields between the ERP and the output format.
  • Allows displaying specific commercial or contractual information for each client (cost center, purchase order, business lines).
  • Optimizes reconciliation and payment processes with structured metadata (IBAN, SWIFT codes, line-item taxes…).
  • Reduces rejections and rework, as formats are correct, leading to fewer returns and better AP/AR KPIs.

Benefits of a personalized e-invoice for CFOs

Consequently, personalized e-invoices generate very interesting financial benefits. Specifically, CFOs and financial teams enjoy:

  • Tax compliance and reduced risk in relation to Verifactu (AEAT) or other regulations.
  • Operational scalability with the ability to issue millions of invoices with rules per country or client.
  • Integration with the most popular ERPs on the market, also avoiding double entry and ensuring accurate automatic accounting entries. 
  • Greater traceability of each document and flow, which is ideal for internal and external audits.
  • Improved cash flow, since invoices with structured data facilitate faster payments.
  • Reduction in cost per invoice.
  • Reporting and internal control with personalized metadata that improves the quality of financial information.
  • DSO reduction (days sales outstanding).

How does easyap approach personalized e-invoicing?

In this regard, easyap offers a cloud platform for the issuance and reception of electronic invoices that focuses on providing interoperability with ERPs and personalized formats. Formats that it evaluates and assesses beforehand. 

Specifically, among its most notable features, the following stand out:

  • Issuance and reception portal, and centralized management of electronic formats and signed PDFs.
  • Ability to adapt formats (with prior assessment) and multiple channels of delivery (portal, email, FTP, upload to specific portals, etc.).
  • Integration with ERPs to extract invoices from the ERP and return accounting entries.
  • AP (Accounts Payable or supplier portal) automation that accelerates automatic reception, validation, and accounting. 
  • Accounting automation thanks to the injection of highly precise entries, which reduces manual tasks. 

However, for a CFO, the question is: will it work with my specific ERP and processes? Below, we show a table with easyap’s integrations with the most powerful ERPs on the market and what customization brings in each case.

ERP
Typical Connection
What does customization allow?
Example 

SAP (ECC/S/4HANA)
Standard interfaces + adapters
Map tax fields by country, generate adapted XML/UBL
Send invoices to public clients in the required national format without touching the ERP.

Oracle (E-Business / Fusion)
APIs / files
Inject accounting entries with cost center and project
Automatic entry per project after validation in easyap.

Microsoft Dynamics 365
Connectors and API
Multi-currency support and rules per legal entity
Differentiate rules per legal entity in different regions.

Sage / Other ERPs
FTP, Web Services, adapters
Custom formats for large buyers
Exporting invoices in the format required by large clients.

Specific use cases of the customized digital invoice

In fact, to be practical, let’s look at two specific examples to understand how or in what way easyap’s customized electronic invoice helps. 

Multinational industrial company with centers in ES, FR, and BR.

Problem: each country requires different fields and formats. Furthermore, client “X” requires the format UBL 2.1 with additional fields.
Solution: easyap configures rules per country and per client. Thus, it transforms invoices extracted from the ERP into the required formats and returns the accounting entry to the ERP.
Result: minimization of rejections in shipments to B2B clients.

Holding company with many subsidiaries and consolidated reporting

Problem: it is complex to consolidate the different cost centers, and there are projects with several manual errors in inter-subsidiary accounting.
Solution: the invoice template is customized to allow for the inclusion of consolidation tags and to automate the entries of the different subsidiaries.
Result: there is a consolidation of the different cost centers, as well as a drastic reduction in human errors. 

Supplier that invoices large buyers with proprietary portals

Problem: each large buyer requires a different format and channel (portals A, B, C).
Solution: easyap simultaneously delivers electronic invoice + signed PDF via multiple channels (secure email, FTP, direct upload).
Result: delivery time is shortened and fewer errors occur.

How to choose the best solution for creating tailored electronic invoices?

As mentioned in the previous point, before choosing a solution, test and ask for demos and references and ask yourself the following questions:

  • Does it support the electronic formats required by your clients and administrations?
  • Can it deliver through the channels your buyers demand (portal, EDI system, email…)?
  • Does it offer standard integration with your ERP or will custom development be required?
  • What SLAs do they offer for format changes and regulatory updates?
  • How do they manage traceability and archiving for audits?
  • What is the total cost (license, integrations, maintenance, adaptations…)?
  • What references do they have in similar companies by size or sector?
  • Do they include support and training?

Additionally, from a practical perspective, we recommend:

  1. Start with a POC. Choose 1 country, 1 business line, and 1 ERP and validate invoice issuance and reception, as well as automatic accounting and reporting within them.
  2. Define business rules by legal entity. Document mandatory fields, validations, and exceptions.
  3. Rollback plan. Maintain a manual process in parallel during the initial phase until KPIs are stabilized.
  4. KPIs. Specifically, measure aspects such as rejection rate, average accounting time, cost per invoice, and expected savings.

And, of course, continue with a monitoring plan and review it periodically.

Why consider easyap for personalized electronic invoicing?

Based on what we’ve seen so far, for large companies that need to issue and receive invoices in multiple countries, with complex ERP integrations and client-specific customization requirements, easyap offers a very powerful proposition:

  • Centralized portal.
  • Ability to work with customized formats.
  • Multiple channels.
  • Experience in AP automation.
  • Error reduction.
  • Improved cash flow.
  • Regulatory compliance across various countries and industries.

Ultimately, a customized e-invoice is a catalyst for efficiency, control, and scalability for any large enterprise.With easyap, this customization will be truly operational, integrable, and sustainable over time.So if you are looking to adapt your processes as soon as possible to what the current market demands,contact us.

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