I've heard that from Feb 1st, PayPal is changing the information it shows to people receiving money from you.
To make sure you're not unwittingly handing out your personal info, have a check of your PayPal settings. The website is different per country, but it seems you can find this setting from Invoices, clicking 'business info' or ''more actions > edit business details', and then change what's shown to recipients, and also via this link :