Possibility of Scanning and adding delivery notes on Purchase Order Header level?

The requirement from the client is as below.

The client want to have a scanning tool at the time of Goods Receipts which should be able to scan the Receipt Delivery Notes in the form of PDF which should then identify the listed Purchase Order based on the OCR (Optical character recognition).

Therfore the system should automatically upload the Photo scanned document as an attachment to the Purchase Order within Oracle at the PO Header Level.

Purpose: It will improve the order trail and allow the business streamline the invoice and delivery queries.