Membercost.com is a Scam Website Scamming - Fraud 2 2 32 1 Mar 12, 2026 2026-03-12T21:59:47-05:00 Mar 15, 2026 2026-03-15T07:22:41-05:00 Online Threat Alerts (OTA) The website membercost.com is not a valid authorized Costco domain, it is a scam. Avoid clicking links or providing personal information to such sites, as legitimate Costco communications come from authorized domains. The website is not affiliated with Costco. It is part of a deceptive rewards scam designed to push users through affiliate offers, collect personal information, and generate commissions for the operators, while providing no meaningful payout in return. About membercost.comSigns of a ScamUnauthorized Domain: Only use official, trusted websites, as Costco warns of fraudulent emails and texts circulating.Fake Offers: Be cautious of unrealistic offers, as Costco does not ask for fees for jobs or special, surprise offers.Phishing Risk: Never enter personal or financial information on suspicious, non-official sites.What to doReport: Report suspicious emails and text messages to the U.S. Federal Trade Commission (FTC).Verify: If you receive a suspicious message, check the official Cstco website for a list of valid domains and contact them directly to verify.