PAYPAL REQUIRES, AS WITH ANY ITEMS YOU SEND THAT THE ITEM IS SENT WITH A TRACKING NUMBER/DELIVERY CONFIRMATION-
EVEN ON INTERNATIONAL SALES - YOU NEED TRAKING NUMBER  " ONLINE" - IT HAS TO BE VERIFIABLE  ONLINE-

AS SELLER YOU ARE RESPOSIBLE TO PROVE DELIVERY (NO EXCUSES-LIKE "BUYER DIDNT BUY INSURANCE OR TRACKING NUMBER",  THAT IS PAYPAL POLICY, AND I LOST BIG TIME, WHEN I SEND SOMETHING INTERNATIONALLY - TO ITALY- AND BUYER FILED UNRECEIVED ITEM CLAIM, AND WON. I GOT MAD CAUSE I KNOW  BUYER GOT BOTH THE MONEY AND THE MERCHANDISE
BEWARE OF ITALY IT'S A NASTY COUNTRY REGARDING RECEIVING STUFF FROM THE US -THEY HATE USA- AND THEY  CHARGE THE RECIVER OUTRAGOUS DUTY TAXES- DO DISCOURAGE IMPORT FROM US, I HAD IN SOME CASE BUYERS REFUSE THE PACKAGE BECAUSE THE DUTY TAX WAS MORE THAN WHAT THEY PAYED FOR THE ITEM. 

AGAIN MAKE SURE YOU HAVE A TRACKING NUMBER -   PROOF OF SENDING IT ,RECEIPT, IS NOT ENOUGH; ALSO ON VALUES OVER 250, YOU NEED SIGNATURE CONFIRMATION;

BUYERS HAVE 45 DAYS TO FILE A CLAIM WITH PAYPAL.
YES IT COSTS EXTRA TO GET THESE OPTIONS - SO SET/CHARGE YOUR INTERNATIONAL RATES ACCORDINGLY (GET A QUOTE FROM THE USPS.COM WEBSITE ; I USE TO OFFER LOW RATES, BUT I CANNOT AFFORD THAT ANYMORE - SINCE I NEED TRACKING- A PAPAL REP TOLD ME I SHOULDN'T SEND STUFF INTERNATIONALYL ANYMORE. THAT'S INSANE!

THE CHEAPEST WAY TO SHIP SMALLER STUFF INTERNATIONALLY AND GET A TRACKING NUMBER IS : REGISTERED MAIL (HAS TO BE IN A SPECIAL ENVELOPE/PACKAGE, SEALED  )- CHECK WITH THE LOCAL POST OFFICE, OR PRIORITY MAIL - WHICH HAS A CUSTOMS FORM THAT IS TRACKABLE ONLINE- FOR THE PRIORITY YOU CAN ALSO PRINT THE FORM THROUGH PAYPAL- PRINT SHIPPING LABEL--AND ITS CHEAPER.

FOR OTHER QUESTIONS , OR ADVICES, WRITE ME- I HAVE SOME GOOD EXPERIENCE INTERNATIONALLY, SINCE LIKE HALF OF MY SALES ARE INTERNATIONAL- I LOVE TO SHIP INTERNATIONALLY SINCE IT EXPANDS MY MARKET- AND THERE ARE MANY GREAT BUYERS OUT THERE;

COMMUNICATION: PLEASE MAINTAIN A CURTEOUS COMMUNICATION !!!
ALSO DO NOT RETALIATE WHEN ONE FILES A CLAIM, OR SAYS THAT HE DIDNT GET THE ITEM-  IF THE TRACKING NUMBER DOESNT UPDATE- AND SOMETIEMS IT DOESNT - ASK THE BUYER TO WAIT ANOTHER WEEK TELLING THEM THAT IT'S PROBABLY HELD AT CUSTOMS.
NEVER ACCUSE OR BLAME THE BUYER !!! IT'S NOT HIS FAULT !!!!!  CUSTOMER IS ALWAYS RIGHT - IF YOU HAVE NOT PROOF OTHERWISE.
KEEP A RESPECTFUL TONE- THAT WAY HE MAY NOT FILE A CLAIM.