$650 is a lot of money. Yes, definitely have those checks. I'd rather they call and check and everything is fine, than they not call, and things not be fine.
650 dollar bills is a lot of singles, it could feed a man for a month or more, or provide enough gas to drive across the US, it must be a lot of money, but it's quickly lost when it comes to basic needs like housing, healthcare and education.
For those saying it's not a lot of money, I shall gladly accept your donations.
$650 would allow me to buy myself a new office chair, or sort out a DIY project. Sure, I can save for these things, but if it's an inconsequential amount for you - it's an amount of consequence for me.