Welcome to the community!
I'm assuming that you are trying to verify that a payment you received is authorized and not a payment you sent?
The PayPal security system is designed to prevent as many unauthorized payments as possible but there is always a chance that a payment sent could have been sent using a stolen credit card, stolen bank or unauthorized use of a PayPal account.
I've pasted our selling tips below from our seller protection page. You can learn more about seller protection here:
From the Safer Selling Tips section on that page:
Unusual Requests and Actions
Always be wary of odd behavior, as it could be an indication of problems to come.
Rare or Expensive Items
It's a good idea to be a little more careful when selling items of high value, especially if the payment is coming from another country. See if your buyer is Verified or has a confirmed address, and find out if PayPal Seller Protection covers your transaction in advance.
The PayPal Seller Protection page has a lot of other great information as well. I also suggest reviewing Seller Protection Guide to learn about Seller Protection eligibility.
I hope this helps!