Being open and honest with your backers will always be the best policy even if its to give them the news that you won't be able to go ahead with your project.
In the event that circumstances change and you are no longer able to deliver your project please email firstname.lastname@example.org as soon as possible and we will end your crowdfunding campaign. Doing this before you reach your target will mean that none of your backers will be charged. We recommend you use the Update Tool in your project dashboard to notify all of your backers before we end your campaign, ideally explaining the reason why you are no longer able to deliver it. Being open and honest with your backers will gain you credit even if the fact that your project won’t be going ahead is disappointing.