Royal Mail Recorded Delivery, what a 'mare

A recorded delivery is not guaranteed to arrive in any way over and
above the standard postage, they go in with the rest of the mail and
the only difference is that a signature is required upon delivery.
Has your recorded delivery actually been confirmed by the recipient as
not having arrived? As I can almost guarantee it has been delivered, it
just wont have been confirmed into the system due to one of several
reasons - postie could be off sick/on holiday/failed to hand in the
delivery card for scanning, person in the locker might have had the
card back but hasn't scanned the barcode or has missed it, website
hasn't received the conformation, etc etc.
It happens a lot, recorded deliveries actually going missing happens
very very rarely - less than 1 in 50,000. Another thing to remember,
you sent the letter, you have conformation it was sent, so stick to
your timetable.Do you think the bank would listen if they said they'd
sent you a letter and you said you'd never received it? Of course not.Royal Mail recorded delivery is not a reliable service.
It would be extremely interesting to see statistics from Royal Mail as
to what percentage of recorded delivery items are actually signed for.
In my experience it is extremely unusual to be asked to sign for a
recorded delivery item. Indeed, I received one yesterday where someone
(probably the postman) had removed the recorded lable before delivering
it without obtaining a signature. Additionally many items are
prohibited from being sent by recorded delivery