What might be an indicator of a package containing prohibited items?

An unusual weight or shape can be a strong indicator of a package containing prohibited items. This is because standard items typically have a predictable weight and dimension relative to their nature. If a package feels significantly heavier or lighter than expected for its size, or if it has an unusual shape that does not conform to typical packaging standards, it may suggest that the contents are not what they appear to be or that they contain items that are restricted or banned.

For example, a parcel that is supposed to contain books but feels unusually heavy might be concealing items like machinery or hazardous materials. Similarly, an oddly shaped package might suggest that the item inside is not something commonly shipped, such as illegal substances or dangerous objects. Recognizing these physical characteristics helps mail clerks and postal employees identify potential risks early in the shipping process.

Standard size and weight, regular packaging materials, and the absence of a return address do not provide adequate insight into the contents of the package. While these factors may raise some concern, they are not definitive indicators of prohibited items in the way that unusual shape or weight can be.