How to get the invoice number and Customer PO using a regex from the below text?

Question

Credit Notes - Original

Invoice Number : 362/867/88540129 Customer PO : 124698753
Invoice Date : 2019-10-17 Reference A : BONNEVILLE POWER 
Sales Order : UTS003832 ADMINISTRATIO
Business Partner : BP0042488 Customer Tax  : 12-9871234

Answer 1

For the invoice number you may try:

(?<=\bInvoice Number : )\S+

And for the customer PO:

(?<=\bCustomer PO : )\d+

Demo

These is just an abstract regex solution though. Most likely, if you were using a programming language, you would take a different approach.