Buyers do not blame sellers they never heard of. When a counterfeit arrives, breaks, or disappoints, the review lands on the listing the buyer thought was yours. The return comes through your metrics. The brand absorbs damage it did nothing to earn.
Counterfeit listings undercut on price, so they often win the buy box or rank on your keywords while they live. Every week of delay is another cohort of buyers forming opinions about your quality based on a product you never made.
Sometimes, with evidence that the purchase came from a counterfeit seller, and it is a slow manual process with no guarantees. The reliable fix is upstream: get the counterfeit listing down before it accumulates buyers, and keep it down.
Counterfeiting shows up in your business metrics, not just on competitor listings: conversion rate, review average, return rate. Enforcement is not a legal luxury; it is defense of the numbers your team is managed against.