I agree with Kaardaata to a certain extent. However i dont agree with gift deed conditions that so and so amt will be going back to the source after so and so period. Because the rights over a particular gift gets exhausted after donor gifts it to the done. Fundamental principle of a gift deed or gift.
However with personal loan deed, it can happen mentioning the T N C.
There are pros and cons in both the cases. I.e. in gift and loan deed
In gifting, son cannot recover the money from father's asset before distributing equally amongst siblings. However if there is a mutual understanding amongst siblings, this issue can work well. Bcoz, if son gifted to father, no tax implications because it is within the definition of relative. And on father's death, further no tax implications as amt is recd by way of inheritance which is outside the ambit of 56(2)(vii).
In case of loan deed, the amt can be recovered before distribution of assets. But in such case clubbing of income wrt interest on FD will arise every year which should have been taken in your it return. In case of loan returning there will be no tax implication on FD but with interest amt , i mentioned it above.
The cases that you have mentioned would be 1 and the same I.e For a will with no details of recovery is similar to having no will for the given case. With only a slight difference with respect to distribution of assets. In case of no will, 1 can convince their brother/sister but in case of will, that won't be possible becoz in a will the assets are already distributed. Hence no question of convincing.
Hope I am able to solve your problem