Normally this is just unsightly but, in extreme cases, may cause leakage. Fortunately, steel cans are one of the most tamper-evident and safe forms of packaging. As with most processed food in Australia, canned food is sold under the names of the manufacturer's or sometimes, a supermarket's brand. Each brand name has an image which reflects the standing of the manufacturer or brand owner in the eyes of the consumer. The consumer's expectations of the quality and distribution of their products is of vital concern to each manufacturer and brand owner.
Enormous damage is done to a brand name if it is associated with food safety breaches.
The Australian Canning Industry recommends that you check canned foods before you purchase them. Badly dented cans should be rejected and drawn to the attention of the management of the retail outlet. Cans which have stained labels might indicate poor storage practices and a possible leak - these should also be rejected. See also Steel can manufacture and How food is canned for more information on these processes.