In some circles it's becoming increasingly common for couples getting married to ask guests to give money rather than physical gifts as wedding presents. A relatively new phenomenon, it's not one that everybody is comfortable with. Some people consider it mercenary; others think it's tacky and vulgar.
The happy couple themselves don't always feel totally at ease with soliciting money either. They may resort to corny poetry in an attempt to soften the message and make it more palatable to their guests. These little poems are intended to make the request seem more bridal and less like a ransom note but really they just underscore the fact it's a financial transaction.
There's: If you were thinking of giving a gift, to help us on our way
A gift of cash towards our house would really make our day.
And: Because at first we lived in sin
We've got the sheets and a rubbish bin.
A gift from you would be swell
But we'd prefer a donation to our wishing well.
Some couples have a wishing well at the reception as a place for guests to deposit envelopes hopefully stuffed with money. Wishing wells are often described as "a tasteful way" for guests to transfer cold hard cash but traditionalists would argue there's no convincing way to disguise such a pecuniary prop.