I was caught speeding. I realised I was speeding about 40 on a 30 downhill so slowed down. Police waved me down from the side of the road so I stopped. I admitted to driving at 40 and they says I'll receive something in the mail which I have. I think I gave thrown the envelope.
So adding 2 and 2 up to make 5
1/ They did send 'something in the mail'?
2/ That something is presumable a Conditional OFFER of a Fixed Penalty of 3pts/£100? (so not 'given' you 3 points but offering it)
3/ You threw away the envelope it came in but think it may have some relevance (I don't think it does, but maybe you're thinking of the 14 days to serve a NIP which is irrelevant for a COFP)
Unless they need to rely on an admission, as AF hints at, the lack of a caution is meaningless and is rarely actually given for roadside stops for speeding as no admission is required to convict you. That said did he at any time warn you that you may be prosecuted for the offence? (regulars may see where I'm going here, but please answer the question first).