You may not need a QR code for a wedding — however, you may want one since they make the planning process much easier for your guest. Here are some examples that QR codes can be used for:
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Easy RSVPs on physical or digital wedding invitations.
Showing weekend schedules
Linking to wedding videos and photo books
Displaying seating charts
Displaying the registry
Augmenting table placards
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Here are some more ways to use QR codes at your wedding.