My family have been invited to a wedding. The couple have not got a gift list/wedding registry and have instead asked for online monetary contributions for their honeymoon. We are not sure how much to give or what kind of sum would be the norm here.
For context, the invitation came from a long-term family friend. We have never met their spouse. We have only been invited for the evening portion of the day - we've not been invited to the ceremony or any of the daytime festivities (e.g. the main sit-down meal).
Any advice on how much we should give?