The bride and groom at the last two weddings DP and I have been to have requested cash presents - the first for their dream home, the second for their honeymoon. (Both of which I would quite like too, but that's by the by!)
Anyway, we have gifted cash on both occasions and have been happy to do so. On neither occasion did we receive any thanks for acknowledgment. The first time I got DP (whose BIL was the groom) to confirm they had received the payment. They said they had and said thank you.
Still haven't heard from the most recent recipients (wedding was 14 April, followed by a week's honeymoon. Bride and groom have been back at work for a couple of weeks). I would like to email the groom just to check the money (which I deposited a few days after the wedding) has been received. Is it too early to do so?
And is it unreasonable to expect a thank you for cash gifts or are they such a given now that they are simply factored onto the 'credit' column of a wedding spreadsheet without comment? I'm not expecting gushing thanks or even a card, by the way, just a 'received your cash, thank you' note to show it's gone through.