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Most onboarding flows ask the same user to prove who they are, over and over. Universal Identity changes that. Users verify themselves once with Sardine, and from then on can instantly approve a share with any partner in the Sardine network — no repeated document uploads, no repeated selfie checks, no repeated waiting. For businesses, that means higher approvals, lower compliance costs, and a smoother first impression. For users, it means an interruption-free experience they actually trust.
Verify your identity — trust signals and consent

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Why Universal Identity?

  • Higher conversion. Every additional onboarding step costs you users. Reusing an existing Sardine verification skips that friction entirely.
  • Lower verification costs. Pay only when new data is required — repeat users cost a fraction of a fresh KYC run.
  • Stronger fraud signals. A network-wide view of verified users improves outcomes for every partner.
  • User-owned consent. Users see exactly what is being shared and with whom, and can revoke at any time.

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How it Works

1

Verify once

On their first transaction with a Sardine partner, the user verifies their identity — confirming their personal information, capturing a government ID, and completing a biometric liveness check.
2

Securely stored

Their verified identity is encrypted and stored on Sardine’s platform, ready to be reused with their explicit consent.
3

Instantly reuse

The next time the user transacts — with the same partner, or any other Sardine partner — they review and approve the share. Already-verified steps are skipped.
4

Done in seconds

Once approved, the partner receives the verified attributes and the transaction continues without interruption.

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Phone Verification

Every new verification starts with a phone check inside your product. Users enter their number, receive a one-time code, and confirm ownership — never redirected away from your experience.
Verify your phone number
Enter verification code

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Document Verification

For partners that require a government-issued ID, users pick the document type they have on hand and capture it directly in the widget. Sardine verifies the document against official databases before the transaction proceeds.
Select your document type

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What Gets Verified

Universal Identity covers everything you need for compliant onboarding. Partners choose what they require, and users supply only what is missing.
  • Personal information — Legal name, date of birth, address, email, phone.
  • Government ID — Driver’s license, passport, national ID, or other government-issued documents, verified against official databases.
  • Biometric liveness — A real-person selfie check, matched against the captured ID.
  • SSN — Collected for US users when required by regulation.

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A Network That Gets Better with Every User

Once a user is verified, their identity becomes reusable across every Sardine-powered partner they choose to share with. Each successful verification also strengthens the network’s fraud signals, which benefits every partner in turn.
  • Frictionless sharing. When a partner requests information the user has already verified, the user sees exactly what will be shared and can approve in seconds.
  • Smart top-up. If only part of what’s needed is already on file, the user completes only the missing pieces.

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Built for Any Experience

Universal Identity drops into web, mobile web, and native mobile applications. It’s available as either an embedded widget that lives inside your existing checkout, or a hosted page that you can link to — whichever fits your experience best.

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Branded for Your Product

Universal Identity is designed to feel like a native part of your product, not a third-party tool.
  • Themed to your brand. Light, dark, or auto modes; configurable primary color, type, and corner radius; your logo in place of Sardine’s.
  • Your language and tone. Partner name, support links, privacy policy, and terms-of-service references all come from you.
  • Localized for your users. Available in English, Spanish, Portuguese, French, German, and Japanese.

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Real-Time Status Updates

Your systems stay in sync with each user’s verification status automatically. Sardine notifies you the moment a verification completes, fails, or requires review — so you can update transaction state without polling.

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Manage Your Identity, On Your Terms

The Sardine Identity Wallet gives every user a clear, plain-language view of their verified identity and exactly who they’ve shared it with. They can update their personal information, audit every connected partner, and revoke any sharing at any time — no fine print, no support ticket.
Sardine Identity Wallet

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Benefits at a Glance

  • For Users: A consistent, interruption-free experience across every Sardine-powered platform, with full control over what is shared.
  • For Businesses: Higher conversion, lower compliance and verification cost, and access to a growing network of pre-verified users.
  • For the Ecosystem: A larger pool of verified users strengthens fraud signals and improves outcomes for every partner.

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Next Steps