In brief: the direct answer
Portal submission, validation and status, and how portal rules differ from a network route. B2g portals and submission rules is best approached through portal as a route with local rules. For b2g portals and submission rules, the portal submission rule decides the outcome. For b2g portals and submission rules, the portal submission rule missing means rejection. For b2g portals and submission rules, the portal submission rule wrongly mapped means wrong meaning. This guide keeps returning to one check for b2g portals and submission rules: read the portal rule before submitting.
The route stage for b2g portals and submission rules is Route. At Route, the portal submission rule is what follows next. For b2g portals and submission rules, a Route decision cannot be repaired later. For b2g portals and submission rules, a Route decision cannot be repaired cheaply. Check the portal submission rule for b2g portals and submission rules before moving on.
The record at this stage
Follow the invoice as a record through b2g portals and submission rules. At Route, the record for b2g portals and submission rules carries the portal submission rule. Answer the portal submission rule for b2g portals and submission rules with evidence. Then the rest of b2g and public procurement becomes easier. Then the rest of b2g portals and submission rules becomes easier to check.
Describe the record before the system for b2g portals and submission rules. Systems change, but the portal submission rule for b2g portals and submission rules stays. Providers change, but the portal submission rule for b2g portals and submission rules stays. Formats change, but the portal submission rule for b2g portals and submission rules stays. For b2g portals and submission rules, ask what record a system produces. For b2g portals and submission rules, ask what record a system accepts. For b2g portals and submission rules, ask what status evidence it returns.
What the data must carry
The data that matters most for b2g portals and submission rules is the portal submission rule. That is not a slogan for b2g portals and submission rules. It is what the next b2g portals and submission rules check looks at. If the portal submission rule for b2g portals and submission rules is missing, expect rejection. If the portal submission rule for b2g portals and submission rules is ambiguous, expect rejection. If the portal submission rule for b2g portals and submission rules is wrongly formatted, expect rejection.
Check the portal submission rule as the receiver reads b2g portals and submission rules. For b2g portals and submission rules, screen correctness is not enough. For b2g portals and submission rules, file correctness is not enough. For b2g portals and submission rules, mapping correctness matters too. Use the mapping table for b2g portals and submission rules first. Use the receiver test for b2g portals and submission rules second. Use a sample invoice for b2g portals and submission rules third.
Validation and evidence
For b2g portals and submission rules, validation has three gates. B2g portals and submission rules structure comes first. B2g portals and submission rules business rules come second. B2g portals and submission rules receiver rules come third. Each b2g portals and submission rules gate has its own failure message.
A b2g portals and submission rules rejection should name its rule. A b2g portals and submission rules rejection should name its field. A b2g portals and submission rules rejection should name the value sent. A b2g portals and submission rules rejection should name the value expected. Without those facts, a b2g portals and submission rules rejection is a delay. Return a b2g portals and submission rules rejection with that request.
Evidence for b2g portals and submission rules is what remains afterwards. Keep the b2g portals and submission rules invoice as exchanged. Keep b2g portals and submission rules status messages with it. Keep any b2g portals and submission rules correction linked to it. An auditor for b2g portals and submission rules asks for that set.
Where it breaks, and the check to make first
The common b2g portals and submission rules break is simple. For b2g portals and submission rules, read the portal rule before submitting was skipped. For b2g portals and submission rules, the receiver found the problem. For b2g portals and submission rules, the sender must now correct it. For b2g portals and submission rules, the sender must resend it. For b2g portals and submission rules, the sender must explain it.
Illustration, with round numbers only, for b2g portals and submission rules: A seller sends 10 invoices for b2g portals and submission rules. 5 fail on the portal submission rule for b2g portals and submission rules. Checking the portal submission rule first for b2g portals and submission rules costs minutes. A b2g portals and submission rules receiver rejection costs days. Sometimes a b2g portals and submission rules rejection costs a payment cycle. That is why b2g portals and submission rules repeats one check: read the portal rule before submitting.
What to verify before acting
Before acting on b2g portals and submission rules, verify three things. First, jurisdiction and transaction for b2g portals and submission rules. First, buyer and country for b2g portals and submission rules. Second, European Commission: European legislation on eInvoicing for b2g portals and submission rules today. Third, the b2g portals and submission rules buyer requirement in writing.
A guide on b2g portals and submission rules organises those questions. A guide on b2g portals and submission rules cannot answer a specific transaction. This guide on b2g portals and submission rules gives general information only. This guide on b2g portals and submission rules is not advice for a specific invoice. For a specific invoice about b2g portals and submission rules, check European Commission: European legislation on eInvoicing. For a specific question about b2g portals and submission rules, ask a qualified adviser.
How this guide is layered
Every guide on this site is read through the same twelve layers, in the order that fits its topic: tax, accounting, lifecycle, evidence, direct intent, transaction, jurisdiction, obligation, data, format, network, validation. The layers are a reading method, not a claim about any single system.
Evidence basis: Primary sources named in the sources section, checked 2026-10-27; country guides are dated research routes, not mandate calendars. Scope: General educational information only; no individual legal, tax, accounting or compliance advice; jurisdiction and transaction specific checks remain with the reader.
Related guides
- B2G and public procurement explained: selling to a public buyer - Receiver obligations under Directive 2014/55/EU, standard invoices, profiles and the portals that receive them.
- B2G contract references and order numbers - Why a public buyer invoice without the right contract or order reference is rejected, even when the data is valid.
- B2G invoicing for small suppliers - A small seller route to a public buyer: portal, provider or network, chosen by volume and by buyer rule.
Back to the pillar guide: B2G and public procurement explained: selling to a public buyer.
In this topic
- B2G and public procurement explained: selling to a public buyer
- B2G contract references and order numbers
- B2G framework agreements and invoicing
- B2G go-live checklist for a first public buyer invoice
- B2G invoicing for small suppliers
- B2G payment terms and late payment
- B2G profiles and CIUS for public buyers
- B2G validation and rejection handling
- Directive 2014/55/EU in practice for a seller
- Public buyer receiver obligations, explained
Primary sources and further reading
These official resources support the standards and regulatory context. Check their current versions before implementation.
- European Commission: European legislation on eInvoicing - Directive 2014/55/EU and the European standard
- European Commission: eInvoicing in public procurement - Public procurement scope and receiver obligations