Hi there! On the sashes, you can use organza or satin. I had organza, and honestly I felt like they weren't substantial enough. Even with a bright orange color, they didn't pop as much as I wanted them to. I wish I had used satin... here's a photo of our set up (at EDR). I think it still looked beautiful, so I have no complaints! With the receipts - you need those for gifts, not personal belongings. So if all of your decorations are your personal items (and you aren't giving them away), you are good. You'll want the receipts for any OOT bag items, and/or favors. The max on that is $300 per person, or $600 per married couple. Hope that helps for those two items at least!