Regarding intolerances/allergies, when this type of issue arises, it's essential to address it immediately. This begins during the menu planning phase, where the courses are selected and any necessary adjustments can be made. Therefore, eliminate or substitute any foods that may be causing an allergic reaction. Obviously, we can't predict which dishes may be at risk, which is why it's crucial to contact your guests as a first step.
After reviewing each member of the wedding guest list and noting any allergies, you can proceed to the second step: informing the restaurant of the information received so they can appropriately modify the menu. This aspect must be carefully considered, as underestimating or ignoring it could lead to serious risks. It's therefore best to act early and prevent potential problems.