Proof of funds for express entry and oinp

Hi, I have a question on proof of funds.
Since last 6 months I have been sending 30k inr per month to my brother. Since I have got ITA, My brother returned all the money that I have been sending amounting to RS 180000.
Now the question is, do I need to ask my brother to mention these details on bond paper in order show that I haven’t borrowed from any one?
Please suggest. Thanks