I'm sorry to hear that you're having trouble viewing a paid invoice. I understand how concerning this would be. If you have not done so already, please visit the Help Center article here to view steps on how to view your invoices.
If you need additional assistance, I suggest contacting our Customer Support by clicking 'Contact' at the bottom of any PayPal website page to view available options. You can also reach out by sending us a private message on Facebook or a direct message on Twitter.
I hope this helps!
Joy If you have found any post within the Community to be helpful, please leave a Kudos or Accept it as a Solution.