If someone asks me for my parking meter coupon to help fight a parking ticket they got, can I give it to them?
Similarly, would I be allowed to use someone else’s? Thanks
My understanding of your question is that one person wants to show the coupon to the judge in order to make believe that they payment was taken care of when they didn’t. This is geneivas daas of the judge and stealing the from the government because of dina dmalchusa. Therefore, it is not permitted for you to use someone else’s coupon, nor to give someone else your coupon. Giving someone else your coupon is assisting them to steal and do something they are not allowed to do.