SEP revalidation
Not sure where you are in Switzerland but try speaking to the club at Birrfeld. I did my SEP revalidation there , although it was integrated as part of a conversion to a new aircraft type. Same basic flight test as in the UK, but CAA insisted that I sent the form and instructors credentials for the sign off ( ie: would not accept the on line submission) but that was no drama once I had the right info.
Birrfeld is a great club, with a nice fleet for hire.