That depends on the country you are applying from:
Australia, New Zealand, Canada, Japan, Monaco, Taiwan, Hong Kong and Republic of Korea have deemed sponsorship. Individuals applying from a country with deemed sponsorship will only need to provide their passport from that country to meet the sponsorship requirement.
San Marino, Iceland and India do not have deemed sponsorship and therefore need to be able to show evidence of sponsorship from your national government which has been issued no more than 6 months before their application is made.