A British reference guide on etiquette issued its first rules Wednesday for how to behave for Halloween.
Debrett's says it has received queries about Halloween manners as the holiday has become more popular in Britain.
Most commonly people ask if it's OK to shut out trick-or-treaters, and how many times children should ring a doorbell before moving on to another house.
Debrett's says children shouldn't be greedy, and should say thank you for treats. It also says households can keep doors shut to children or put out bowls of treats so trick-or-treaters can help themselves.
The holiday originated with Europe's Celtic pagans marking the end of summer and was brought to the United States by immigrants.