I hold a UK and EASA PPL (A) and did my revalidation in Switzerland about 12 months ago with a local instructor, I spoke to CAA who said they needed the SRG 1119 C (or E, can't remember) sent off the paperwork and they came back and asked for the Instructors certification and medical. Promptly scanned and sent those by e mail and it was problem solved they re issued my validation !
It seems ( unsurprisingly) that there is a quite a bit of discrepancy between various countries in EASA......sigh !