NN deployed the PeopleSoft Financials Data Export Import Utility (DEIU) to meet their e-invoicing needs

NN is a financial services company active in 10 countries. We provide retirement services, pensions, insurance, and banking to approximately 19 million customers.

eInvoicing is becoming mandatory across countries in Europe; therefore, we were exploring the options available in PeopleSoft FSCM.

With the goal of using PeopleSoft-delivered functionality as much as possible and building core solutions that can be reused by all countries, NN decided to use the DEIU and PeopleSoft-delivered features to map data fields and import and export eInvoices.

Previously, we had a manual entry process or imported vouchers from Excel in Accounts Payable. In Billing, invoices were sent manually via email or automatically from PeopleSoft.

We went live with the first country on January 1, 2026. We expect this will bring automation and time savings, especially in Accounts Payable, because invoices will be received and loaded automatically, significantly reducing manual actions. The solution works best in combination with the PO module, as voucher build will carry over ChartField information from the PO if the PO information is populated on the invoice.

Experiences and takeaways

We started with no experience whatsoever and learned on the way. Oracle-delivered UBL 2.1 mappings for AP and BI modules very helpful to speed up the process at the beginning, although we had to make a lot of modifications in the mappings:

• Some mappings had to be removed.
• Some mappings were added to improve the process.
• Specific logic was incorporated for countries we support—for example, VAT, nonPEPPOL countries.

Since the landscape is currently not standardized, some countries use PEPPOL, some not yet. We had to develop APIs to connect with third parties or with governments.

We developed a way to import and send invoices automatically.

PO information is not received in some countries. And even in PEPPOL where it is mandatory, invalid information is often received. We developed a post-process program to find POs based on the amounts to improve the automation part.

Future

We are currently in the process of implementing Page and Field Configurator as part of the e-invoicing process to ensure that certain fields are mandatory on a bill, as required by PEPPOL. Additionally, we are implementing an approval workflow process in the pay cycle.

We plan to upgrade PeopleTools this year and are considering the adoption of the Landing Page functionality. We also plan to implement the delegation workflow.