You have no way of checking whether or not the money sent to you was obtained via nefarious means. You need to conduct a background check on the person sending you money. He/she should also preferably be verified, as it lowers the chance of risk
Because they move the PayPal money to their bank accounts first so they have the "cash" in hand. But it won´t help you if you have withdrawn the money and send what for the payment was. If a chargeback comes because of unauthorized use of account or something like that your account will possibly become negative balance. And if it is in your real name you have to pay back the money to PayPal. That´s from my experience, I lost 6000$ last year with PayPal because of something like that.
PayPal is able to guarantee protection against reversal of funds only if a chargeback occurs for nonreceipt of the product or in the event of an unauthorized charge (resulting from a stolen credit card or account takeover). Even then, you're entitled to this protection only if you have followed the terms of the Seller Protection Policy. Seller protection policy applies only to US, CA and UK, if I am not wrong.
Generally, if it is a large amount, wait 5-7 days before you send over goods. Most of the time, by this time, the person's whose credit card or account details was stolen from would have called paypal and placed a hold on the funds. Since the goods are still with you, you're safe.
That's why tou always have to have an empty account that you don't use. Once you get the money, you transfer it right away to a bank account (up ro $500 only because it won't be verified), than you close the PP account. You widthdraw the money from the bank and close that one also.... Make new account for the next one...
i have no idear for this because . for checking paypal is verry difficult . sometime fews The paypal or CC's Boss not know about the mony has been stealed. or . if the payment from CC->Unveried paypal->verified paypal .->for you . This need 30 days for bill of statement to CC'sBOSS but best the way for checking Clear money of' Paypal is . you can call Paypal if your trade is bigmoney .
I always do a background check on the person before accepting any money. Just make sure to check his/her trading rating. Ask him/her a few questions and get to know him. Within few minutes, you'll know if it's better to do business with him/her or not.