Hello. Regarding a fully stamped service booklet.
I couple of years ago I approached my original supplying dealer regarding an issue with a cracked wheel arch cover. The van still being under a six year warranty.
The dealer said that they would approach the manufacturer on my behalf.
A day or two later the dealer contacted me asking for copies of all the service sheets and a copy of the service book showing all the entries.
(I had been using a local approved mobile service engineer for the servicing, before setting up the first service I actually contacted the manufacturer to confirm this agent was approved by them)
Again a few days after sending the details I was again contacted by the dealer who asked me to again send the copy of the service book details because one of the dates wasn't clear and the manufacturers were questioning it. I resent a better copy which they were happy with.
So regarding the service book it does appear that manufacturers treat it very seriously. Also bear in mind that I had sent copies of all the corresponding engineer report sheets as well, all clearly dated.
So as Parksy says in his post the best advice would be to make sure you get the service book from the dealer or at least an approved duplicate if the original is lost.
My story doesn't actually end well for me because the outcome was that the actual wheel arch covers (Spats I think they are called) are not actually covered by the guarantee.
a fact I'm sure they could have stated without actually seeing the second email of the service book)