--- title: How I Stop Fake Signups From Farming Free Credits... description: A developer describes a common problem with free-trial and free-credit signup flows: fake or disposable emails farming free resources. The fix proposed is a... canonical: https://daily.dev/posts/how-i-stop-fake-signups-from-farming-free-credits-js-python--r9gwj3ryz twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: How I Stop Fake Signups From Farming Free Credits (JS/Python) | daily.dev og:description: A developer describes a common problem with free-trial and free-credit signup flows: fake or disposable emails farming free resources. The fix proposed is a... og:url: https://daily.dev/posts/how-i-stop-fake-signups-from-farming-free-credits-js-python--r9gwj3ryz og:image: https://api.daily.dev/og/posts/r9Gwj3RYz.png og:image:alt: How I Stop Fake Signups From Farming Free Credits (JS/Python) og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # How I Stop Fake Signups From Farming Free Credits (JS/Python) **[Medium](https://daily.dev/sources/medium_js)** · 3 min read · 1 upvotes · 0 comments ## Summary A developer describes a common problem with free-trial and free-credit signup flows: fake or disposable emails farming free resources. The fix proposed is a simple allow/block gate that calls an email validation API and checks a verdict field before letting a signup proceed. Copy-paste Node.js and Python code snippets are provided, along with a sample API response showing fields like verdict, disposable, deliverability, and policyReason. The API referenced is the author's own product, emailscore.neuralevo.com, which offers a free checker and free API access for developers. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Questions this post answers ### How can I block fake signups that abuse free trial credits using disposable emails? Gate signup on a single verdict field returned by an email validation check: allow means continue, block means stop with a neutral message. The check inspects syntax, disposable/throwaway domain lists, and mail deliverability (MX record lookup) to decide the verdict, and a policyReason field explains why. Most signup flows only need to branch on verdict, checking the other fields only when deeper debugging is needed. _Developers comparing anti-abuse approaches for signup flows can track practical writeups like this on daily.dev._ ## Similar posts on daily.dev - [Your sign-up form is a weapon](https://daily.dev/posts/your-sign-up-form-is-a-weapon-cwnsa8fnc) · Hacker News · 0 upvotes · 0 comments - [A bot added around 5,000 addresses to my newsletter](https://daily.dev/posts/a-bot-added-around-5-000-addresses-to-my-newsletter-xvtlbpexa) · Flavio Copes · 0 upvotes · 0 comments - [How I Found an Email Verification Bypass on an AI Freelance Platform](https://daily.dev/posts/how-i-found-an-email-verification-bypass-on-an-ai-freelance-platform-u8qbqrzz7) · InfoSec Write-ups · 0 upvotes · 0 comments - [Schneier on Security](https://daily.dev/posts/schneier-on-security-wcigreann) · Schneier on Security · 0 upvotes · 0 comments - [My friend’s email startup finally got traction. Turns out it was a phisher.](https://daily.dev/posts/my-friend-s-email-startup-finally-got-traction-turns-out-it-was-a-phisher--t4kizq9px) · Medium · 0 upvotes · 0 comments --- Tags: [#javascript](https://daily.dev/tags/javascript), [#python](https://daily.dev/tags/python), [#fraud-detection](https://daily.dev/tags/fraud-detection) [View this post on daily.dev](https://daily.dev/posts/how-i-stop-fake-signups-from-farming-free-credits-js-python--r9gwj3ryz) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"How I Stop Fake Signups From Farming Free Credits (JS/Python)","url":"https://daily.dev/posts/how-i-stop-fake-signups-from-farming-free-credits-js-python--r9gwj3ryz","mainEntityOfPage":{"@type":"WebPage","@id":"https://daily.dev/posts/how-i-stop-fake-signups-from-farming-free-credits-js-python--r9gwj3ryz"},"datePublished":"2026-08-24T15:49:47.649Z","dateModified":"2026-09-14T07:31:38.605Z","description":"A developer describes a common problem with free-trial and free-credit signup flows: fake or disposable emails farming free resources. 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The check inspects syntax, disposable/throwaway domain lists, and mail deliverability (MX record lookup) to decide the verdict, and a policyReason field explains why. Most signup flows only need to branch on verdict, checking the other fields only when deeper debugging is needed. Developers comparing anti-abuse approaches for signup flows can track practical writeups like this on daily.dev."}}]} ```