Protruding wires, tinfoil, or string are present. Pressure or resistance is noted when removing the contents. Outer container has irregular or asymmetric shape or has soft spots or bulges. Wrapping exhibits previous use, such as indicated by traces of glue, mailing labels, return addresses or tape. Several combinations of tape are used to secure the parcel.
Package makes a buzzing or ticking noise.
Contents of parcel make a sloshing sound. Do not open the article. Isolate the mailing and secure the immediate area. Do not put in water or a confined space such as a desk drawer or filing cabinet. If possible, open windows in the immediate area to assist in venting potential explosive gases.