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Verifications

A verification is a record of a check Kontorion ran (or had a third-party run) against a customer - a VIES VAT lookup, a KYC document review, a payment-instrument ownership confirmation. Verifications are first-class objects with their own typed status so downstream features (reverse-charge eligibility, promotion conditions, payment-method gating) can read directly from them.

Anatomy

Field	Notes
customer_id	The customer this verification belongs to
provider	Free-form string identifying the external system that ran the check (vies, stripe_identity, manual, etc.). Provider-specific
verification_type	Free-form string for the kind of check (eu_vat, business_registration, identity_document, bank_account_ownership, …). Provider-defined; treat unknown values as opaque
status	One of pending / verified / expired / failed
verified_at	When the most recent passing check completed
expires_at	When the verification's verified window ends (provider-set or org-policy)
provider_reference	Provider's own ID for the underlying check (the VIES query record, the Stripe Verification Session ID, etc.) - useful for follow-up calls and audit
last_checked_at	When the engine last polled / re-ran the check

Both provider and verification_type are free-form strings, not closed enums - Kontorion doesn't try to be the source of truth for which providers and check types exist. Define the values that match the providers you've wired up.

Status lifecycle

Code
pending  →  verified  →  expired  →  pending   (re-verification)
   │           │
   ↓           ↓
 failed     failed
   │
   ↓
pending   (retry)

Status	Meaning
pending	The check has been started but the result hasn't come back yet - typical for async providers (VIES, KYC)
verified	The provider returned a passing result. verified_at is set; expires_at may be set if the provider declared one
expired	A previously-verified check passed its expires_at. The customer needs re-verification before the verified state unlocks again
failed	The provider returned a definitive negative

Allowed transitions:

From	To
pending	verified, failed
verified	expired, failed
expired	pending (kick off re-verification)
failed	pending (retry)

The transition rules are enforced - invalid transitions return 409 INVALID_TRANSITION.

Verifications don't currently emit dedicated webhook events. To react to a status change, poll the verification or watch the consuming feature's events (e.g. an eu_vat going expired will surface as a tax-treatment change on the next invoice).

What verifications gate

Other features read verification status; nothing in the verifications surface itself enforces gating. Common consumers:

Consumer	Reads
Tax engine	An eu_vat verification at status verified is the precondition for intra-EU B2B reverse-charge treatment. expired or failed falls back to the consumer (B2C) path
Promotions	The external_verification condition matches against the named verification type + status
Your application	Read GET /v1/verifications?customer_id=... and gate plan tiers, payment-method activation, etc. however your business rules dictate

Creating

Code
curl -X POST https://api.kontorion.eu/v1/verifications \
  -H "Authorization: Bearer sk_…" \
  -d '{
    "customer_id":       "cust_abc",
    "provider":          "vies",
    "verification_type": "eu_vat"
  }'

The request body is intentionally small - no provider-specific input fields. The provider knows where to find what it needs (e.g. the VIES provider reads the customer's tax_identifiers["eu_vat"]). The response carries the verification ID and initial status (pending for async providers, the final state for synchronous ones).

For the EU VAT case specifically, you can also kick off a check via POST /v1/customers/{id}/validate-vat - it's a thin wrapper that creates an eu_vat verification using the customer's primary VAT ID.

Updating status

For external type and manual reviews, your application or the dashboard reports the outcome via PUT (not POST) on the status endpoint:

Code
curl -X PUT https://api.kontorion.eu/v1/verifications/{id}/status \
  -H "Authorization: Bearer sk_live_..." \
  -H "Content-Type: application/json" \
  -d '{
    "status": "passed",
    "evidence_ref": "doc_upload_42",
    "reviewer_user_id": "user_alice"
  }'

The transition rules above apply - the engine refuses to set, e.g., verified → pending directly.

For provider-driven status updates, the integrating service (the VIES poller, the KYC webhook handler) owns the lifecycle - you don't manually flip status when a provider's automated check completes.

Endpoints

All Verifications endpoints - GET /verifications (cursor-paginated, supports ?customer_id= filter), GET /verifications/{id}, POST /verifications, PUT /verifications/{id}/status.

Related

• Customers - owns the verifications and the tax_identifiers providers read from
• Taxes - reverse-charge gating against eu_vat status
• Promotions - the external_verification condition type
• Payments - payment-method activation typically reads the relevant ownership / KYC verification