Thank you for your message.
Yes, they may send various verification methods including the one you mentioned (they may also give you a call to verify the order). You shouldn't be worrying.
You can also call them directly (i.e. initiate a call from your side) and ask about that message to be 100% sure that it's from them. Here is their contact information - the phone numbers are down below on the page: https://payproglobal.com/contact/
Hope that helps.