This is a great question....
How about this for a play it forward story. And, ironically, I just was thinking about it again today....
I had to ask the group gift gals for the $$ too a few years ago. Because life gets busy and it had fallen off their radar. They were all very apologetic and gave me checks. Ugh. One more errand for me to run. So I put the checks into an envelope to deposit. The envelop slipped down in between my driver seat and center console in my car, and I found it one day before selling the car about 2 years later. Not one of those gals ever asked me why I had not cashed their checks. Honestly, just today, sitting in church, that amount of lost $$ popped up in my thoughts, which was near $100 about 5 years ago. We've moved, and clearly it's not worth pursuing.
My 2 cents - ask for cash.