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Outgoing invoices

E-Invoicing Validator

Quality assurance for your outgoing invoices 

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Our solution

E-Invoicing Validator

for outgoing invoices

With the KMLZ E‑Invoicing Validator, we provide businesses with a powerful tool that ensures reliability both during the implementation of solutions for generating compliant e‑invoices and in ongoing operations. Already during implementation, the validator helps ensure that the invoicing solution in use works correctly from a technical perspective and generates valid e‑invoices. At the same time, the validator can be permanently integrated into the outgoing invoicing process to ensure that every invoice is automatically checked and validated before being sent. 

E‑Invoicing Validator as support during the implementation process 

Even before going live, companies can use the E‑Invoicing Validator to automatically test their generated e‑invoices and the validation solution in use, thereby safeguarding the quality of their solution. 

The validator: 

  • automatically validates test invoices, 
  • identifies errors in syntax, semantics and content stipulated by VAT law, 
  • generates a detailed validation report for each invoice, presenting all results in a structured format, 
  • enables fast and targeted corrections – without manual XML analysis, 
  • ensures that incorrect structures are identified and resolved at an early stage. 

The result: significant time savings, improved data quality and a clear increase in compliance. 

E-Invoicing Validator in ongoing operations – security before invoice dispatch 

The KMLZ E‑Invoicing Validator can be seamlessly integrated into existing invoicing processes. After invoice creation, but before transmission to the recipient, validation can be carried out automatically. 

In this role, the validator acts as a continuous quality assurance layer: 

  • errors are identified immediately,
  • the transmission of incorrect e‑invoices is prevented, 
  • complaints and payment delays are reduced, 
  • compliance risks are minimized and customer relationships are strengthened. 

Particularly in dynamic IT environments – where system updates, customizations or process changes occur regularly – the validator provides an additional layer of security. It ensures that every generated e‑invoice continues to meet legal and technical requirements over the long term. 

Features

Legal certainty & compliance: Validation of format, business rule and content errors – fully compliant with EN 16931 and the requirements set out in the German Federal Ministry of Finance circular dated 15 October 2025 

Automated testing: Validates large volumes of test invoices without manual effort and highlights errors immediately 

Targeted error detection: Provides clear validation results, enabling direct implementation of improvements 

Operational security: Identifies faulty invoices before they are sent 

Time and cost savings: Reduces complaints, prevents correction loops and sustainably optimises internal processes 

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