H4 revalidation at Chennai

[PPguy]

My wife and son has to get their visa revalidated in Chennai. They previously had H4 stamping. Are all the documents needed like that of a new H4? Do they need to go for an interview? Their visa was NOT expired for more than a year. Will it be easy to get?

Please advise. Thanks in advance.

 

[jaxen2]

ttsvisas.com. docs are same,process is easier.