A wedding card can matter without a check inside
I like a wedding card with a personal message in it. A little memory, something you're happy for the couple about, even a slightly awkward sentence you wrote yourself. I don't think an envelope needs a check inside to be worth keeping.
I understood the disappointment in a weddingplanning thread in this morning's hot listing. The poster said close friends and relatives hadn't left a card or note after a 60-person wedding. They clarified that they weren't expecting a gift and a card. They had hoped for either, and missed the personal messages.
The replies disagreed pretty sharply. Some considered a few written words basic courtesy. Others had sent registry gifts and had no idea anyone expected a separate card. In a reply this morning, one person described feeling hurt at first, then remembering the time and expense friends had already put into celebrating with them.
I'm closer to that last response. You can wish someone had written to you without deciding they didn't care enough to bother.
Wanting a message isn't the same as wanting money
I wouldn't call someone gift-hungry just because they wanted a note. Those are different disappointments. Reading a friend's words again years later can matter, especially if you don't see each other often. If that's what you were looking forward to, being told that cards are pointless probably won't help.
But the importance of paper isn't obvious to everyone. Someone might congratulate you warmly, dance with you, and assume you already know how happy they are. Another guest might think the message attached to a shipped gift covers it. I wouldn't ask either person to prove their affection again in a different format.
There's a related argument on X under MoneySavingExpert's question about skipping wedding gifts if you don't plan to marry, with replies continuing today. Yesterday, one reply said several friends hadn't even given a card and that the omission was remembered. That's one person's account, not a survey. Still, it shows why the conversation about presents can be about more than the money.
I'd be careful about what I did with that memory. If a friendship feels one-sided, look at the friendship over time. One missing envelope doesn't tell you much on its own.
If you're the guest, write something personal
My advice is to send a message if you can, particularly when you know your friend saves cards. You don't need to explain why there's no money enclosed. You also don't need to buy expensive stationery.
A simple example: "I'm so happy I got to celebrate with you. Seeing you both so relaxed and happy together was my favorite part of the day. I'd love to have you over when things settle down." Change it until it's true for you. Don't promise dinner if you don't want to host dinner.
If you forgot, you can still send it now. "I meant to leave you a note on Saturday" is enough introduction. A late message doesn't become worthless because the card box has been packed away.
If you're the couple and written memories matter to you, give guests one easy place to leave them. Put the guest book somewhere people will see it, with pens that work and a clear invitation to write a memory. Ask someone to point it out. Don't depend on everyone independently guessing how much you'd like a keepsake.
Afterward, thank people for what they actually did. "We loved having you there, especially getting that dance together" is a lovely message to someone who came without a gift. You don't have to pretend they bought anything, and you don't need to hint that you noticed they didn't.