UserCheck guides
Learn how to protect your business from fake users.
Using TLDs as a trust signal
Learn how domain registration requirements vary across TLDs — and why that matters for trust and fraud prevention.
Thomas Petracco
How to normalize email addresses to prevent duplicate accounts
Learn how to normalize email addresses to prevent users from creating multiple accounts through email aliasing. This guide explains the concept and offers code examples.
Thomas Petracco
Best GitHub lists for disposable email domains (18 lists tried and tested)
Here are the 4 best Github lists to find disposable email domains, I've tried and tested 18 different repositories, based on their popularity, activity, and accuracy.
Thomas Petracco
How to prevent free trial abuse (without blocking real users)
Learn how to prevent free trial abuse on your platform.
Thomas Petracco
What is email forwarding
Learn how email forwarding works and how it can impact your service.
Thomas Petracco
How to block disposable email addresses
Learn 3 ways to block disposable email addresses on your platform: use an API service, create a DIY solution, or use GitHub lists.
Thomas Petracco