On Monday, February 27, 2017 at 3:16:55 PM UTC-6, Andrew Ainslie wrote:
Hi all,

I'm lending my glider to a British pilot who has an EASA licence. I just called Costello up and asked what I needed to add him to my insurance, and they said that he needed a "USA add-on". Anyone know what they're talking about? I thought an EASA licence was internationally accepted. Anyone been through this with a friend or competitive pilot? Thanks in advance!

Call your local FSDO. In my case they issued a US license based on my German glider license. Valid as long as the German license is maintained/extended. It was quick and easy.