Systems (100, 1300) and methods (1700, 1800) for detaching a tag (1304) from an article. The methods comprise: detecting when the tag is in proximity to a detaching unit (1302); verifying that the article has been accepted for a purchase transaction or has been successfully purchased using information received from the tag; mechanically coupling a tag body to the detaching unit when it has been verified that the article has been accepted for a purchase transaction or has been successfully purchased; detecting when a pin (1306) of the tag is no longer in proximity of the detaching unit; and mechanically decoupling the tag body from the detaching unit when the pin is no longer in proximity to the detaching unit.