My son wants to remit some money in his mother's account jointly with me(father). It is very much clear that it will be tax free in India being a gift.
Does Income Tax department need some proof to treat this amount as gift? Is there any mandatory set of documents or deed that are required? OR We simply asked our son to send some thing on plain paper / scanned copy signed by him to declare that this amount is given as gift which is gifted to us through this cheque number/date/bank etc?
Does our son need to show this amount as gift in his yearly return or not. What are the implications to his tax return due to gifted money in the US?