# Use cases

Fifteen concrete situations, from verifying a supplier before payment to anticipating public-contract expiries. Each page states what the routes do, what they do not do, and what the figures are worth.

- [Verify a supplier before you pay them](https://api.sirenic.eu/en/use-cases/verify-supplier-before-payment-identity-vat-iban) — One call, one verdict: active company number, VAT validated live at VIES, IBAN form-checked, bank identified. No account, no API key, paid per call.
- [Cross-check the identifiers printed on an invoice you received](https://api.sirenic.eu/en/use-cases/check-incoming-invoice-do-its-identifiers-contradict-each) — An invoice's VAT number can be valid at VIES yet belong to another company than the printed number. One call cross-checks all three identifiers.
- [Preparing supplier master data for the French e-invoicing mandate](https://api.sirenic.eu/en/use-cases/french-e-invoicing-get-your-supplier-master-data-ready) — Reception becomes mandatory on 1 September 2026 for every VAT-liable French company. Clean 2 to 100 suppliers per call, with per-block provenance.
- [Validate an intra-community VAT number](https://api.sirenic.eu/en/use-cases/validate-intra-community-vat-number-against-vies-pay-per) — Live validation against VIES for every EU member state, with the consultation identifier kept as proof. An outage is never served as an invalid number.
- [Assessing a customer's default risk](https://api.sirenic.eu/en/use-cases/assess-customer-s-default-risk-with-scorecard-returned) — A 0-100 score at ~12 months, computed at call time from filed accounts, with every component, its threshold and a confidence level.
- [Monitoring a portfolio of customers or suppliers](https://api.sirenic.eu/en/use-cases/monitor-customer-portfolio-daily-alerts-signed-webhook) — 1 to 100 targets checked daily against official sources, for 30, 90 or 365 days. Ed25519-signed webhook, e-mail digest, and always pollable.
- [Detecting insolvency proceedings](https://api.sirenic.eu/en/use-cases/detect-insolvency-proceedings-france-europe) — Administration, liquidation, deregistration: by company number or by criteria. Czech, British and Latvian registers also covered.
- [Comparing companies on official data](https://api.sirenic.eu/en/use-cases/compare-2-5-companies-per-axis-rankings-no-overall-winner) — 2 to 5 companies side by side: identity, default-risk score, latest statutory accounts, alerts. A comparability block flags when the comparison is meaningless.
- [Automating business verification (KYB)](https://api.sirenic.eu/en/use-cases/kyb-automated-business-verification-with-per-block) — One call returns a full file on a French company: identity, officers, legal alerts, accounts, sanctions screening — each block with its provenance.
- [Screening a counterparty against sanctions lists](https://api.sirenic.eu/en/use-cases/screen-name-against-6-official-sanctions-lists) — UN, EU, OFAC, United Kingdom, French asset freezes, Swiss SECO. Fuzzy matching with a 0-100 confidence score per hit — never a bare yes/no.
- [Identifying a company's beneficial owners](https://api.sirenic.eu/en/use-cases/beneficial-owners-open-uk-latvia-closed-france) — The UK PSC register and the Latvian register, live and as open data. For France, only ownership from filed articles of association is available.
- [Checking a provider's authorisation](https://api.sirenic.eu/en/use-cases/check-financial-firm-s-authorisation-eba-eiopa-esma-arcep) — Payment, e-money, insurance, telecoms, asset management, crypto: three official registers by company number, plus the ESMA registers by name.
- [Anticipating public-contract expiries](https://api.sirenic.eu/en/use-cases/anticipate-public-contract-expiries-before-notice) — Buyers typically re-tender 4 to 9 months before expiry. Filter contracts ending inside your window by CPV segment and department, with the incumbent holder.
- [Building a B2B prospecting list](https://api.sirenic.eu/en/use-cases/build-b2b-prospecting-list-from-official-french-registry) — Multi-criteria filters over the complete registry: activity, area, legal form, workforce, age, certifications. 100 active companies per page.
- [Querying European company registers](https://api.sirenic.eu/en/use-cases/european-company-data-thirteen-official-registers-one-schema) — One response shape for thirteen countries, plus what each register does not publish. Belgian, Danish, British and Swedish annual accounts.