Plots of land on Mars are not available for sale. Consumers who take up the offer would be lucky to receive at most, a certificate, in return for their money. Confirm that the company is who they say they are and check the information against other sources. Many Australian and overseas companies have their own websites. Phone the company's investor relations department, confirm the right website address and check any information directly with the company.
Reputable companies are usually happy to help potential investors.
Resist pressure to invest or sign up immediately. Check any investment or financial service with a trusted financial adviser, broker or solicitor. Avoid responding to spammers. Be careful about giving away financial and other personal information. Be wary if a company seeks personal details that you have already provided.