Re: CPL/IR licence application rejected (no signatures in logbook)
Any flight tests should be signed off (type ratings, BFRs, skill tests, and other completed ratings).
Any I/F time in a simulator must be signed.
In the UK, any stalling lessons must also be signed off (unless changed under JAA now?)
It is not a requirement to have each and every lesson in your history signed off, however you certainly are then covered!