Validation, errors and corrections

The pillar guide

Validation, errors and corrections explained - Business rules, rejection reasons, credit notes and resubmission, with messages a person can act on.

Working guides in this topic

• Actionable rejection design for receivers - What a good rejection message contains, and why a vague rejection wastes both sides time.
• Common validation errors and their fixes - Missing fields, wrong codes, total mismatches and identifier errors, each with a fix that does not break another rule.
• Corrected invoices vs credit notes: which to use - A corrected invoice replaces, a credit note adjusts, and the choice depends on receiver and tax rules.
• Credit notes: full and partial - When to credit in full, when to credit in part, and how each choice affects totals and tax.
• Error trends and root causes - Counting errors by rule and field, finding the root cause, and fixing the source instead of each invoice.
• Reading a rejection message: from error text to action - How to turn a rejection into a fix: rule, field, value, expected value, and resubmission route.
• Resubmission without duplication - Correcting and resending without creating a duplicate invoice, using references and duplicate detection.
• Validation layers: schema, business and receiver rules - Three gates in order, what each one catches, and why passing one gate does not guarantee passing the next.
• Validation rule change management - When a receiver changes a rule, how to learn, test and migrate without breaking live invoices.
• Validation testing before go-live - A test set that covers valid, invalid and edge cases, run against the receiver rules before live exchange.

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