For the purpose of capital gain, what is considered the date of purchase – date of stamp duty paid, date of registration or date of possession?

The Selling Deed or the Sales Deed will be the correct document for deciding the date of sales or the date of selling to avoid the Capital Benefit Fee. Nevertheless, if the property is bought in instalments, the date for that reason will be the letter of ownership. The answer will ultimately depend on the facts and circumstances of each case.