Very tight SIL - regifts voucher issued 9 months ago - do I say something?

[Shebeen]

My sister in law, who I have many cheap/tight stories about just gave my son a voucher for his birthday which was in August - the voucher was issued in November of 2010. I really want to say something to her - would you?

Lime trees and fourkids- what delightful minds you both have.

On this YABU, take him to spend it right away. Why does it matter? Unless its for a shop where you'd struggle to spend the money.