Most of the shops, fuel stations and other business establishments in Srinagar - the summer capital of the state - were shut, while public transport was minimal, officials said.
They said there were very few street vendors visible in the city today due to the strike.
Reports of shutdown were also received from most of the other district headquarters of the Valley, the officials said.
Security forces were deployed in strength at sensitive places where barricades were also erected.
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The more than five-month unrest in the Valley had left 86 people dead and thousands others, including 5,000 security personnel, injured.
The separatist groups - both factions of Hurriyat Conference and JKLF - yesterday appealed the people to observe a complete shutdown on Friday and Saturday over WPR issue.
They alleged that the decision on issuance of identity certificates to WPR was aimed at changing the demography of Jammu and Kashmir.