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How to validate FEL

1. 1
   File integrity and parsing

   Preserve the source bytes and hash, then confirm the file is readable and well formed.

2. 2
   Syntax and profile

   Apply the correct schema and profile identifiers for XML.

3. 3
   Semantic business rules

   Validate parties, dates, lines, taxes, totals, references and payment data.

4. 4
   National and network rules

   FEL format or profile signals · Local tax/business identifier structure · Core invoice fields and arithmetic consistency

5. 5
   Identity, security and routing

   Confirm national identities, signatures, hashes, QR and recipient routing as applicable.

6. 6
   Official outcome

   Use Tax-authority clearance, registration or reporting platform. and preserve the response from FEL.

Applicable profile layers

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