Answer:
There are people trained in possum control who can legally and humanely remove possums from your yard or your house. Possums, which are quite unrelated to the opossum of North America, are protected native animals in Australia, and should not be hunted or killed. In New Zealand, where the possum has become a major pest, they may be removed, but it is best to call an expert who can ensure the possum, which is a highly territorial animal, does not return.