Individuals or businesses that wish to run ads on certain sites will need to form an agreement with the site's owner before it can be done. So if you're the person in charge of running and handling the site, then you'll need an insertion order. Having one will help guarantee that the advertiser is granted the right to post ads on your site, so long as all of the terms and conditions are accepted. It's the best way of protecting your site and it helps to point out the payment needed in order for the ads to be displayed. Use this template and you won't have any problems in providing such an order.