This site was built to compliment the existing NetSuite Professionals Slack Community by adding a means for members to easily find answers to common questions and to create a searchable database of those questions and answers.

NetSuite Professionals

Hi, is there anyway to save the items of an item receipt for a sales order? The item receipt and the sales order are completely independent.

That sounds like you need a special purchase order linked with the SO

<@U03GYQZTZDW> both orders are independent of each other. I think it's not possible. I don't know if we can use supply allocation

You are correct, without a Special Purchase Order this is not possible.  Supply Allocation will only work based on the dates of the SO and PO according to the allocation rules you have setup.
You can also try to use Order Reservations to allocation certain inventory to certain orders, but that has it's own set of problems as well, so I don't usually recommend this process in most cases.

A special purchase order will hard allocation the inventory coming from a PO to ONLY the SO it is related to as you are requesting, but you hvae to make the PO from the SO, not use the regular order items screen or make a one-off PO