Requesting a charity contribution rather than a gift: It is very poor wedding invitation etiquette to even mention gifts but most invited guests will enquire if there is a wedding gift list. The other members of the wedding party should be encouraged to put the word around as to what the bride and groom would prefer.
While many couples may find traditional wording much more appropriate, there are couples who enjoy taking a risk together. The poem chosen for the invitation does not need to be written by a famous poet, it can even be something that the two of you made up together. The wording of your wedding invitation should always suit your personal style and most importantly show everyone how in love you two are!