Deciding exactly how far in advance to send even RSVP forms depends on the nature and length of the event. Generally, sending the form out at least 4-6 weeks before the event is advisable to allow attendees sufficient time to respond and make necessary arrangements. However, you may need more time, especially for events like weddings. Likewise, sending the form even earlier may be beneficial for large-scale or destination events. Make certain to offer attendees ample time to plan and secure accommodations or travel arrangements.