Guides
E-mail verification vs account existence checks: what's the difference?
Mailbox validation says an address can receive mail. An account check says it is registered on a service. When to use each, and the privacy rules.
7 min read
Articles tagged “Fraud prevention”
9 articles.
Fraud prevention
How to reduce fake sign-ups with layered phone and e-mail checks
A layered sign-up defence: format, line type, messaging presence, spam reputation and e-mail checks, mapped to friction tiers you can measure.
8 min read
Fraud prevention
IRSF: international revenue share fraud, explained
How international revenue share fraud turns your calls and texts into someone else's income, how it differs from SMS pumping, and how to cap your exposure.
7 min read
Guides
Mobile number portability: why carrier lookups can be wrong
A number's prefix shows the network its range was given to, not the one serving it today. How porting works, where lookups fail and how to handle it.
7 min read
Fraud prevention
OTP fraud prevention: the checks to run before you send a code
A practical pre-send pipeline for one-time passcodes: normalize, check line type, messenger presence and reputation in one request, then decide.
8 min read
Fraud prevention
Screening inbound calls with spam reputation
A call-center workflow for routing inbound calls by spam reputation: levels, reasons, STIR/SHAKEN, limits of the data, and why no_reports isn't safe.
7 min read
Fraud prevention
SIM swap fraud: the signals to check before you trust an SMS code
What a SIM swap is, which SIM-swap data exists and who can get it, and which signals to combine before you trust an SMS code when that data is missing.
9 min read
Fraud prevention
SMS pumping: how it works and how to stop it
How SMS pumping (artificially inflated traffic) drains OTP budgets, the signals that give it away, and a layered checklist to stop it before you pay.
8 min read
Fraud prevention
VoIP number detection for sign-ups: what works and what to watch out for
Why VoIP numbers matter at sign-up, fixed vs non-fixed VoIP, which signals detect them, and how to add friction without turning away real customers.
7 min read
