Block fake signups, detect disposable emails before KYC, protect transactional deliverability, and reduce fraud signals at onboarding — with a GDPR-compliant API under 200ms.
Transaction confirmations, 2FA codes, fraud alerts, and account statements are critical communications. If the email address is invalid, these messages bounce — increasing support costs and leaving customers without important information.
Fraudulent accounts disproportionately use disposable email services. A real customer creating a legitimate bank or payments account uses their real email. Disposable address at onboarding is a high-confidence fraud signal.
Email addresses that appear in recent data breaches may indicate stolen credentials. BounceZero cross-references against breach databases — a high breach signal at signup warrants additional identity verification.
Under GDPR Article 5(1)(d), personal data must be accurate and kept up to date. Maintaining invalid email addresses in your customer database violates this principle. Regular list verification is a GDPR compliance requirement for fintech.
Marketing spend targeting invalid addresses is wasted. More critically, customers whose contact information is wrong cannot be reached for upsell, retention, or renewal — directly reducing LTV.
Every verification returns a structured JSON response with 40+ fields your KYC logic can consume.
disposable
Address from a known temporary email service — high fraud risk
breach_count
Number of known data breaches this address appears in
domain_age_days
Age of the email domain — very new domains are higher risk
mx_provider
Mail provider (Google, Microsoft, corporate self-hosted)
score
0.0–1.0 deliverability and legitimacy confidence score
social_profiles
Whether the address maps to LinkedIn, GitHub, or other social presence
role_based
Is the address a shared inbox (info@, admin@, support@)
smtp_definitive
Whether the mailbox was definitively confirmed or requires ML inference
UK ICO registered (ZC132839). DPA available. Data processed in UK/EU. Email verification queries SMTP without reading email content.
BounceZero stores only the verification result, not the email address content. Retention configurable to your compliance requirements.
Every verification logged with timestamp and response. Full audit trail exportable for FCA, DORA, or PCI-DSS review.
Fintech uses email for 2FA, transaction confirmations, and fraud alerts. Invalid emails at onboarding mean these never arrive. Disposable emails signal fraudulent intent. Real-time verification catches both before KYC begins.
Yes. Fraudulent accounts disproportionately use disposable addresses. BounceZero flags disposables, checks breach databases for stolen credential signals, and scores domain age and social presence — all correlated with fraud.
Yes. UK ICO registered (ZC132839). DPA available for clients. Email verification queries SMTP without reading message content — equivalent to checking if an address exists, not processing message data.
Under 200ms for cached addresses. Under 2 seconds for new addresses requiring live SMTP verification. Suitable for real-time form validation without degrading onboarding UX.
Yes. Contact us for a DPA tailored to your GDPR, FCA, or DORA compliance requirements. Enterprise customers receive a custom DPA as part of the onboarding package.
Real-time API, GDPR compliant, DPA available. 100 free verifications to start.
Block fraud at onboarding, meet KYC standards, reduce support costs
Fraudsters use disposable email addresses to create multiple accounts, bypass identity checks, and abuse promotions. BounceZero's real-time API identifies disposable, role, and invalid addresses before account creation — in under 400ms. Block at the signup form, before any KYC process begins, to reduce fraudulent applications entering your review queue.
Fintech onboarding depends on email: verification links, 2FA codes, transaction confirmations, regulatory disclosures, and account alerts. An invalid email at signup means the user cannot activate their account, cannot receive their first transaction confirmation, and cannot be reached for fraud alerts. Catching these at signup reduces drop-off and support tickets.
Under GDPR, financial services must maintain accurate personal data records and be able to contact users for legitimate purposes. Storing invalid email addresses creates a compliance gap — you cannot contact users for mandatory regulatory communications. BounceZero verification at onboarding and quarterly CRM hygiene ensures your contact data stays accurate for compliance reporting.
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