You can apply for revaluation/ verification within one month from the date of the CA IPCC result declaration. There is no standard procedure for revaluation, you have to send a by handwritten application to ICAI.
Things to be kept in mind regarding IPCC revaluation -
You can apply for revaluation online or office.
Fees for revaluation is Rs 100 for each paper and Rs 400 for all the papers.
It usually takes 6-8 weeks for Verification result to come
Your application must contain your Name, Exam name, Registration number, Month and year of exam, Your address, Paper/s subject/s details you want revaluation.