Use Cases for Thumbmark

Thumbmark helps businesses protect against fraud and enhance user experiences through accurate visitor identification. From preventing account takeovers to personalizing user journeys, discover how ThumbmarkJS delivers value across various scenarios.

New Account Fraud

Prevent fraudsters from creating multiple fake accounts by identifying repeat visitors even when they clear cookies or use incognito mode.

  • Keep track of fingerprints your customers use

  • Challenge signups of frequently used fingerprints

  • Flag fingerprints of abusive users and challenge new signups with them

Payment & Credential Fraud

Identify users attempting fraudulent transactions or credential stuffing attacks by tracking device fingerprints across login attempts and payment flows.

  • Keep track of fingerprints your customers use

  • Challenge payments of frequently used fingerprints or payments done by bot/datacenter traffic

  • Review payments done by suspicious fingerprints

Coupon & Promo Abuse

Stop users from exploiting promotional offers by creating multiple accounts or clearing cookies.

  • When validating a promo code, check the users' fingerprint against previous users

  • Keep a list of fingerprints you have noticed abusing promo codes

  • Challenge suspicious fingerprints before applying promo code

Content Scraping & Bot Detection

Protect your valuable content and APIs from automated scraping and bot attacks.

  • Challenge suspicious traffic from datacenters

  • Outright block bots or high-threat traffic from your site

Persistent Shopping Carts

Maintain shopping cart contents across sessions, even when users clear cookies or browse in incognito mode.

  • Store cart contents server-side with the fingerprint, even without a logged-in user

  • For highly unique fingerprints, retrieve cart contents from server on return visit

Content Paywalls & Free Content Limits

Enforce content access limits fairly by tracking unique visitors regardless of cookie manipulation.

  • Track content consumption based on fingerprint

  • Show a paywall when content limit exceeded for fingerprint

Customization & Personalization

Remember user preferences, themes, and personalized content across sessions without requiring account creation.

  • Store preferences server-side attaching to a fingerprint

  • For highly unique fingerprints, retrieve preferences when user returns

PURPOSE

LEGAL BASIS

Operating and securing the Website and Services

Legitimate interests (Art. 6(1)(f)), namely maintaining the availability, functionality and security of our infrastructure

Website analytics, including analytics using cookies, local storage, fingerprinting or comparable technologies

Consent (Art. 6(1)(a)) for analytics technologies requiring consent; legitimate interests (Art. 6(1)(f)) only for strictly necessary, aggregated or server-side analytics where no consent is required.

Generating demo-page fingerprints

Legitimate interests (Art. 6(1)(f)), namely demonstrating our technology to visitors who actively use the demo page.

Account creation, authentication and administration

Performance of a contract (Art. 6(1)(b))

Providing the Services and related support

Performance of a contract (Art. 6(1)(b)); legitimate interests (Art. 6(1)(f)) for service security, abuse prevention and support operations not strictly necessary for contract performance

Billing and payment

Performance of a contract (Art. 6(1)(b)); legal obligation (Art. 6(1)(c)), including the Finnish accounting and tax laws