Are oily stains considered a sign of a suspicious package?

Oily stains on a package can indeed be considered a sign of a suspicious package due to the potential for hazardous materials or substances being present. The presence of such stains may indicate leaking contents, which could pose a risk to safety. In contexts where packages may contain harmful substances—be it in a shipping scenario, mail handling, or other similar environments—any indication of unusual physical characteristics, like oily residues, should be treated seriously.

Recognizing oil stains as a warning sign reflects a cautionary approach to dealing with packages whose contents are unknown. Vigilance in identifying unusual features helps ensure appropriate safety protocols are followed, potentially preventing harm or mitigating risks associated with unforeseen substances. Therefore, acknowledging that oily stains are always a concern for the presence of suspicious materials aligns with important safety practices in handling packages.