Matching your invitation suite
Pick a color from your existing invitation palette rather than defaulting to black — this generator's custom color picker takes any hex code, so if your stationery designer gave you a palette, use those exact values. Keep the code itself modest in size relative to the card; it should read as a small, considered detail, not the visual centerpiece.
RSVP card vs. wedding website: what to actually link
The cleanest approach for most couples: one QR code linking to a wedding website, and let that website handle RSVP, registry, accommodation and details as separate pages within it. That avoids needing multiple codes for multiple purposes, and it means updating any of those details later doesn't require reprinting anything.
If you don't want a full wedding website, linking directly to a simple RSVP form (a typeform, a Google Form, whatever you're comfortable with) works fine too — just make sure it's the one thing you most need guests to complete.
Where to place it — invitation, insert, or signage
A separate RSVP insert card gives the code more room to be sized properly without crowding the main invitation's design. If it goes directly on the invitation, a corner placement near the RSVP details reads more naturally than the center of the card. For venue-day signage — a welcome sign, a guest-book table — a larger printed version of the same code works well for a Wi-Fi password, a photo-sharing album link, or the wedding website again for guests checking details on the day.