In my Perm records I register: Card issue No, route sheet provided, date of registering and finally date ridden and time together with date sent for validation. That covers if lost in post.
I have many gaps in the latter boxes, which suggests many folk out there have not yet ridden. I do not mind if you do or do not ride, although I do have a pile of SAEs just waiting for cards. If you have any 'old' route sheets (and all mine are dated) you might want to email me to receive the current version. I do ride my routes and am in the process of including more inter-instruction distances based on OS mapping and GPS lapping.
I will cite my Cotswold Corker Perm as recently heavily updated and now starting in Bishops Cleeve (just like the Calendar event on 13 Feb).
Let me know the date of your R/S and Current r/s by return email.
SteveP