The Pay Later feature in the Online Store is ideal for creating an invoice, or giving the purchaser an opportunity to pay by cash or check, or several other situations as well.

To use Pay Later, first set up a Product, Package, or Membership in your Online Store. Then, navigate to Store, find the Product, and on the far right of its row, click the Edit icon. Scroll about halfway down the Edit Product page on the left side to toggle ON (blue) Enable Pay Later. This allows the user to purchase the Product without paying for it on the website. At the same time it puts the amount in Accounts Receivable and gives you some options for payment.

Now that the product is in the Store, the purchaser will have payment options to Pay in Full or Pay Later. When selecting Pay Later, the purchaser's cart will show the Product and require the usual basic information, but it will not require payment at the time of checkout. When the user checks out, the system will record the income for the Product, and it will also record the quantity sold on the product, so it gives you the ability to keep track of quantity without recording payment. When the user checks out, it will show a receipt with the payment method as Pay Later. The user will receive an invoice by email which will include a link to Pay Your Invoice Here. The user will receive a reminder to pay the invoice every two weeks until the invoice is paid.  

If you would like to take a cash or check payment, go to Accounting > New Transaction. The transaction type will be an Accounts Receivable Payment. Select which outstanding payment is being paid and enter the amount. If you are entering the amount manually, you can enter any amount. If the user is paying through their link, they will have to pay the full amount.  

To keep track of outstanding Pay Later invoices, go to Accounting > Reports and in the upper dropdown menu select Accounts Receivable Report.