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Organiser's guide

Waiting lists and reminders: how to fill a room without spam

Written by Carton Blanc (MAKEO SAS) · Updated

In short

  • A waiting list opens when capacity is reached: later registrants are told they are not confirmed.
  • A reminder goes only to guests who have not replied, never to those already registered.
  • Two reminders at most per guest for one event: the first at two weeks, the second the day before for registered guests only.
  • An unsubscribe link appears in every email and takes effect on all the organiser's mailings.
  • Withdrawals are made up by calling the waiting list in order of registration.

Filling a room means managing two numbers

A room is full when the number of people present reaches its capacity, not when the number registered does. Between the two lie withdrawals, which are more frequent when the event is free.

The waiting list handles that gap. It accepts more requests than the room can hold and puts them in order, so each withdrawal opens a place for the first person waiting.

What a waiting list should tell the guest

A person on a waiting list is not registered. The message they receive says so plainly: "you are not confirmed, we will write if a place becomes free". Without that sentence, they turn up on the night and find a closed door.

In Carton Blanc, the person on the waiting list is informed as soon as they register. They know they must wait for a message before travelling.

How to remind without spam

Spam is not about the number of emails but their relevance. A reminder that reaches someone who already registered is noise. One that reaches someone who saw nothing is a service.

The rule is therefore to target. The software sends the D-14 reminder only to guests with no reply, and the D-1 reminder only to registered guests. Each group receives a message that concerns it.

  • A first reminder, two weeks before the event, to guests with no reply.
  • A reminder the day before, to registered guests only.
  • A follow-up message, with one text for those who came and another for those who did not.
  • No mailing to anyone who unsubscribed: they are left out of all the organiser's lists.

The subject and body of a reminder that works

The subject line gives the date and the stakes: "Thursday 12 November: 18 places left". It holds a fact, not a formula. The body fits in three lines: date and venue, how many places remain, the registration link.

Avoid reminders that make people feel guilty ("you still haven't replied"). They get "unsubscribe" clicked more often than "register", and a shrinking file costs more than a missed registration.

Calling the waiting list when a place frees up

A place freed at D-10 almost always fills; a place freed on the evening itself rarely does. Call the people waiting in the order of their request, giving them a short deadline to confirm. After that, move to the next.

Remember to say no at the end: a last message to those still waiting, sent the day before, saves them a trip and leaves a good impression for next time.

What the waiting list teaches you

A long waiting list signals demand: it justifies a second session, a larger room or an extra date. Note its length at each event and compare from one to the next.

Check-in on the night completes the picture: the gap between registered and present shows how much overbooking you can afford next time.

A checklist for the organiser

Three checks made once hold for every later event.

  • The real capacity of the venue is known, including safety limits.
  • The waiting list text says plainly that the registration is not confirmed.
  • You have decided in advance how long a person called back has to confirm.
  • The closing message to those still waiting is ready before the day before.

Frequently asked questions

How many reminders can I send without wearing people out?
Two at most before the event: one at two weeks for non-responders, one the day before for registered guests. Beyond that, the risk of unsubscribing outweighs the benefit.
Does a person on the waiting list receive reminders?
They are told of their situation at registration. They are not confirmed until a place becomes free.
Can I overbook a room?
That is the organiser's decision. Set the capacity slightly above the room if you know your withdrawal rate, and use the waiting list for the rest.

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Carton Blanc costs €99 incl. VAT a month (€82.50 excl. VAT) with no commitment, or €990 incl. VAT a year (€825 excl. VAT). A single event costs €49 incl. VAT (€40.83 excl. VAT), paid once: its emails and page stay open until 30 days after its date.

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