A swap table is easy to imagine when useful items are finding new homes. The less visible question is what happens at closing time. Without an agreed plan, a sharing event can leave the organiser responsible for boxes nobody intended to keep.
Define the offer before the event
State which items are accepted, their expected condition and any limits on quantity. Keep the categories narrow enough for the group to manage. Avoid implying that every unwanted item can be donated somewhere else afterwards.
Check the venue’s rules and agree who is responsible for the space. A table in a shared hall still needs someone to manage arrivals, questions and closing.
Explain ownership of unclaimed items
Decide whether contributors must take remaining items home or whether a named organisation has agreed to receive suitable leftovers. Confirm that arrangement rather than assuming a charity will accept everything.
In a fictional book swap, contributors might return near closing to collect unclaimed books. The notice should say this before people carry boxes to the venue.
Review the scale afterwards
Count what was manageable and note which categories caused problems, without collecting unnecessary personal information. A smaller, clearer event may be easier to repeat than a table open to every kind of object.
For an ongoing version, see starting a sharing shelf. Both formats benefit from a plan for items that do not move, not just enthusiasm for the ones that do.