Expiry date — Is there a clear end date (not "WORKING forever")? Official source — Does the code/invite come from the merchant or a disclosed partner page? Region & plan — Valid in your country and for the plan you actually want? One path — Cashback portal OR coupon extension — not both fighting on the same order. Tracking cookies — Allow them for this checkout session if required by the portal. Screenshot distrust — Ignore undated social screenshots of codes. RefDeal deals — Prefer /deals/ listings — expired rows are filtered at build + runtime. After purchase — Keep order confirmation until rebate/bonus clears. If a page hides expiry, skip the code — urgency without a date is a red flag. Print