Yes, and it's increasingly common. Wedding expert Zoe Burke points out that 'most modern couples already have lived together for some time and own all the appliances and towels they could ever need'. If you anf your fiancée are already swimming in kitchen appliances, it makes sense to receive money towards a honeymoon or a deposit for a house, especially in the current economic climate.
The only thing to do is make sure you tells guest why you want the money. Zoe adds that 'saying you’d appreciate contributions to your dream honeymoon will go down way better than writing ‘cash is preferred’ on your invitations'.