Which government's digital services platform was the first to implement a 'once-only principle' where citizens only need to provide information to the government once?

The digital transformation of government services has been a global priority in the 21st century, with various platforms developed to improve citizen access to government services. Some countries have emerged as leaders in e-governance, creating comprehensive digital platforms that have revolutionized how citizens interact with their governments. Test your knowledge about these pioneering government digital platforms that have set international benchmarks.

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Estonia's X-Road platform
Singapore's SingPass
UK's GOV.UK Verify
Australia's myGov