Australian Consumer Law provides for consumer guarantees, according to which the taking of a particular action (for example, the application of due care and skill) or the presence of a particular fact (for example, a particular quality) is deemed as guaranteed where goods or services are supplied to a consumer in certain circumstances. Remedies lie against the supplier or (where goods are supplied) against the manufacturer or both. Pursuant to its application provisions, Australian Consumer Law applies to conduct outside Australia if one of several alternative criteria is satisfied. One criterion is that the defendant carried on business within Australia. There is no express requirement that the defendant's business activities in Australia include the transaction with the plaintiff. This article argues that comity requires an implied restriction on the territorial scope of the consumer guarantee provisions, and searches for the most appropriate criterion for that purpose.