Fake nonprofit / charity donation receipt from a freemail domain (gmail, yahoo, hotmail) with both urgency language and a payment link — real donation receipts are proof of payment already made and never contain payment links.
nonprofit-donor-receipt-spoof
What this tier means
Warning signal — bulk / marketing / mild spam. Contributes to the trash score but is not by itself sufficient.
How Gorganizer detects this
Fake nonprofit or charity donation receipt sent from a freemail domain (gmail.com, yahoo.com, hotmail.com, outlook.com, icloud.com) with BOTH urgency language AND a payment link. This is a SACRED dual-nature signal — real nonprofit donation receipts are protected by safety-keywords.ts ('tax receipt', 'donation receipt'). This signal fires ONLY on the fake variant where all three conditions hold simultaneously: (1) sender is freemail, (2) charity/nonprofit/foundation/tax-receipt language, (3) urgency language, AND (4) a payment link in the body (donate, payment, give, contribute, gofundme, paypal, venmo, cashapp, etc.). Legitimate nonprofits send receipts from their own domain and NEVER include a payment link in a donation receipt — the receipt is proof of payment already made. A freemail sender with urgency + payment link + charity language is a donation-harvesting or charity-impersonation scam. Detection: freemail sender domain + charity/nonprofit vocabulary + urgency language + payment-link href + no In-Reply-To. Source: GC1-R17; FTC charity scam advisory 2025; IRS donor acknowledgment requirements.
False-positive guard
Every signal in Gorganizer feeds a multi-module score — never a sole verdict. This is a warning-tier signal — bulk / marketing / mild spam. It contributes to the trash score but never triggers deletion on its own. Gorganizer requires multiple signals + a margin over the safety floor before any email is moved to trash.
About the scoring engine
Gorganizer's scoring engine emits over 1,800 signals across six modules — headers, sender, subject, body, attachments, and structural metadata. Every email is scored by every module independently; the final verdict requires multiple modules to agree and the trash score to beat the safety floor by a margin.
Sacred safety guards — never delete starred emails, replies, calendar invites, receipts/invoices, or attachments — apply unconditionally regardless of any signal.
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