We renew our views each day by saying I love you and meaning it and by helping each other to get the most from life that we can, also by saying sorry when we've had differences of opinion, we don't need a special fuss made about it. I think Alishka's Dad's idea was lovely because it meant so much to his wife to have her wedding ring blessed/churched but it was done privately and, I think, very romantically, well done that man. Each to their own but it's not something I would do. I don't think presents are necessary, the charity donation box idea is good though. Back to the OP, I think you'd be expected to wear something formal, as for a present, I'd ask "are you having charity donation boxes for the guests to put money into?" or something similar and see what reaction is. As they've been married a while they won't need typical wedding style presents, and you can have too many photo frames despite what some people think, they could end up with 50 of them. I think that would actually be quite funny. 