someone wondered t'other day if they are legally binding - they are, of course.
But a thought just occurred to me - in the context of looking at this site:
http://missinghorsesonloan.webs.com/If you do put your horse out on loan, as well as a contract, you could ask to see ID - passport/driving licence for preference! - especially if it is someone you don't know/hasn't come with an introduction from someone you trust.
Any honest person will not object, and if someone does object then you needn't lend them the horse!
As most of you are aware, banks, solicitors and other professionals - especially those dealing with money - always ask for ID (we have to!) and it is a good way of protecting yourself.
and if anything does go wrong, you may even have taken a note or copy of the relevant details, which may prove of assistance....