it might depend on the charity. I think the Linus Project (quilts for kids) actually has a page at their website that says what they need for you to donate a quilt.
100% washed cotton, washed in a non perfumey addative soap, made in a smoke free invironment - stuff like that. Its because sometimes babies/kids have allergies along with all the rest of the stuff they're going thru and they want the quilt to be theirs alone - something they can always have with them no one can take away.
The quilt becomes a stable force for them, so they dont want them to find they have a allergy from it, its not because they're being picky about donations. sharet