Automation does not verify a site
An automatically sent offer does not prove that the account belongs to the service. Establish the official domain and the sender-identification process described by that site.
Check items, not the avatar
Review outgoing and incoming skins, extra payments and any replacement offer. A familiar name, profile picture or bot number does not establish a correct transaction.
Keep account access private
Do not share passwords, backup codes, cookies or API keys with anyone promising faster trading. If an offer unexpectedly changes, stop confirming and contact official support.