Quote Originally Posted by adoy View Post
i have a product with attribute. how do i make it so that it allows checkout even when a certain attribute is out of stock and will just notify the customer that the product will be shipped it 3 weeks.
You can allow checkout even when there isn't sufficient stock by setting Admin > Configuration > Stock > Allow Checkout to true.

You can't notify the customer as to when the stock for the particular product and attribute combination will be shipped as your Zen Cart doesn't have this information to communicate.