IPhone 6 fraud, will it be stolen?

So IIm selling an iPhone 6. I have a buyer and he said he has a family member in abroad and he wants me to ship it to him/her and he will be the shipping. He said he will give me the money through pay-pal which IIm fine with. But once I told My family about this they said he can claim he never got the phone and get his money back with the phone. Can this happen? And if so how do I Prevent it

Classic scam

nicely spotted

your family is absolutely right - if you don't send to the address associated with the PayPal account, all your protections evaporate

It's a scam
You can't prevent it as you are ONLY protected by Paypal if you have signed proof of delivery to the buyer's VERIFIED address. That's why scammers have you send overseas. Once you send it, they contact Paypal claiming they were hacked and there's an unauthorised transaction. Paypal contacts you asking for signed proof of delivery to the buyer's verified address. You won't have this as you sent it abroad, and Paypal refunds him out of your account and the relative resells yoru phone for cash

Tell him you are sorry but per Paypal's terms you can ONLY ship to a Paypal verified address which you always verify by calling Paypal after the money appears in your account. So tell them that you can't send to the relative, that's their responsibility. Once you receive the money in your account you will call Paypal to verify the address on the account and send it there through registered mail with a tracking number and insurance. If they do not agree, then you are sorry but you have another buyer willing to pay in cash tomorrow

You wait for the money to clear in paypal, you make sure you charge the buyer the postage and tell them you will only send it either direct to him or his family member and it will be recorded delivery, so the parcel will need signing for on delivery and you can track that, so can prove it was signed for and received.