If you got a voucher in a dream, then such dream symbolizes the attempt you have put into something very important. The dream about voucher could also denote to new chances you are going to get.
Dream dictionary: Voucher dream meanings
…Dreaming of vouchers, foretells that patient toil will defeat idle scheming to arrest fortune from you. To sign one, denotes that you have the aid and confidence of those around you, despite the evil workings of enemies. To lose one, signifies that you will have a struggle for your rights with relatives….