Yellow Cards

[SaskPool]

Not the most important question I've ever asked but:

When some refs wave a yellow card at a player, they stop, write something down (probably name, number and crime). On the other hand, some refs show the yellow card and just carry on without taking any notes.

Why is this?
Does the 4th official make a record of yellows?
Do the refs that don't write anything down have incredible memories?
What gives?

Answers on a postcard

 

[SeasideEssexXile]

My mate I guess is classed as Englands top ref at this time can recite players names for fun and recall tackles cards etc from.years before for some individuals

 

[SaskPool]

Thanks SEX. So what you are saying it's a memory thing