Design around three verification speeds
A practical architecture separates checks by delivery pattern:
- ✓Instant or near-real-time digital checks for eligible identity and database validation.
- ✓Managed checks such as employment, education or references that depend on external sources and analyst follow-through.
- ✓Field checks such as physical address verification where evidence must be collected on location.
Your customer journey should reflect those differences. An asynchronous field case should not be designed as though it were a synchronous API lookup.
What the API contract should provide
Product teams need a stable request identifier, clear status model, webhook/event updates, structured results, error handling, idempotency expectations, authentication/key management and a sandbox that mirrors production request shapes. The application should be able to distinguish a technical failure from a verification that is legitimately still in progress.
Avoid conversion-killing KYC design
Do not collect every possible field before you know it is needed. Use the organisation's risk and regulatory rules to determine which checks are required at onboarding, before activation, before a transaction or during later review. Explain pending field activity clearly to customers rather than leaving them on an indefinite spinner.
Portal and API should complement each other
An API is ideal when verification belongs inside your product. A portal remains useful for operations teams handling exceptions, one-off cases and batch work. Both channels should converge on the same underlying case status and report rather than creating two disconnected processes.
Avant Tech's Verification API supports instant, managed and field verification patterns through one integration, while Background Checks provides the broader service and portal experience.
Common use cases
Banks and fintechs can combine identity and address verification in customer onboarding. Lenders can add employment or guarantor checks where underwriting requires them. Marketplaces can verify workers or vendors before activation. Employers can connect candidate screening to an ATS or onboarding workflow.
Before choosing a provider
Validate sandbox availability, supported check types, webhook behaviour, status semantics, evidence returned, data-handling controls, production onboarding requirements, operational support and what happens when a third-party source or field case takes longer than expected.
Plan the integration
Share your onboarding journey, check types and expected monthly volume. Talk to our verification team and we will map the API flow to the decision points rather than forcing your product into a generic screening process.