How can one convert physical holding into electronic holding i.e how can one dematerialise securities?

n order to dematerialise physical securities held by an investor, he has to fill in a DRF (Demat Request Form) which is available with the DP and submit the same along with physical share certificates one wishes to dematerialise. Separate DRF has to be filled for each ISIN Number. The complete process of dematerialisation is outlined below