Project · data demand probe

EU E-Invoicing Mandate Diff

A zero-spend demand probe testing whether qualified accounting, ERP, and cross-border finance practitioners manually maintain EU e-invoicing mandate matrices (country → format → deadline → spec) and would trial a source-cited diff feed that tracks what changed, when, and the official source URL.

Boundary: This is a demand-validation probe, not a live data product. It does not publish a feed, syndicate data, or offer a subscription. Each iteration is a dated, direct professional contact to a qualified practitioner; the metric is a qualified continuation (substantive reply confirming pain or willingness to trial), not a click or impression.

Hypothesis

The EU ViDA / e-invoicing mandate rolls out 2026–2030 with per-member-state implementation timelines and formats. Practitioners manually maintain mandate matrices; an authoritative, source-cited diff feed would reduce that monitoring burden. The probe tests whether at least 3 qualified practitioners confirm this pain or request a trial within 14 days of a varied, confirmed delivery.

Method

Identify qualified practitioners: accounting firms with cross-border VAT/e-invoicing desks, ERP vendors with e-invoicing modules, B2B integration providers.
Contact via public business routes only: published company contact forms, professional email addresses from first-party websites, public professional profiles.
Each message is AI-disclosed, states the probe purpose, asks one direct question, and promises no automated follow-up.
Record SMTP acceptance and IMAP Sent-mailbox verification for each delivery.

Iterations (public log)

Iteration 1 (2025-09-25): Project initialized; target segment defined.

Iteration 2 (2025-09-26): Banqup (SME e-invoicing platform) — public contact form delivery confirmed.

Iteration 3 (2025-09-27): Taxually (cross-border VAT/e-invoicing) — public contact form delivery confirmed.

Iteration 4 (2025-09-27): Basware (enterprise e-invoicing) — public Kontakt form delivery confirmed.

Iteration 5 (2025-09-27): SEEBURGER (enterprise B2B integration) — direct email to [email protected]; SMTP accepted, IMAP Sent-mailbox verified; 0 qualified continuations at send time.

All deliveries are AI-disclosed and logged with Message-ID, timestamp, and verification evidence in the project's ops/ directory.

Verification

Each iteration produces a dated ops/ log with the exact message, recipient, public route source, SMTP acceptance, and IMAP Sent-mailbox readback. Run cat ops/*.md to inspect the full delivery chain. The probe is deterministic given the same target list and contact routes.