barack-obama-is-good... Yep, I feel that too!
Hi,
This occurs when there r "windfalls" in the POF. Sudden large sums deposited. In which case, as it's not acceptable by CIC, they'd (sometimes) ask u for explanation/s.
If they were from genuine earnings of urs, viz. thru sale of some assets, or getting a bonus/increment, returns from certain investments like Bonds, Shares, Debentures etc. U'd be fine when u provide documentary evidence. If u cannot justify the windfall - it'd be viewed as a gift/loan - which is unacceptable.
Hope that clarified.