There are lots of different terminologies when it comes to letters and parcels.Letter has been written tonight, it'll go recorded.
You may be using the wrong one, but mean something different. So this is just for clarity so you ask for the correct thing.
This is not what you want.Royal Mail Website said:What is Recorded delivery? Much like with Tracked delivery, you will be sent a receipt when the parcel is delivered. However, Recorded delivery only provides proof of postage - not proof of receiving it - because no one needs to sign for the item.
You need a service where someone signs for it, not just puts it through a letterbox and records they've done so.
Royal Mail are not asking for signatures just now due to COVID but a signed for service means the letter will be handed to someone and they will be required to give a name.