As the OP stated, the transactions show up as "completed" in their account. I think it's just a mistake that somebody made in the part of the system that sends out notification emails. "Money is waiting for you" is something I've only seen a few times before and that was usually when somebody sent me money to an email that was not associated with a PayPal account. So the money was waiting for me to set up a PayPal account, or associate the email with my existing PayPal account. In may case, I'm seeing this message regularly with PayPal payments from my online store, but the payments are completed and my other software is importing the transactions as such. Don't panic. But if you are requesting money from people or getting these messages sent to email addresses of yours that are not associated with your PayPal account, then do check into them. And of course, always watch out for phishing emails and make sure that they email is legit.
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