I've posted this before, so it's "free" for our Dear Leader to show it again.
I posted this as quite possibly the most-superfluous certificate I had run across:

"This block of four is genuine." No kidding.
Someone pointed out that, if you wanted to make the claim that you had collected blocks of all of the listed shades, then you may wish to have certificates backing up your claim, and
this certificate agreed that you have a block of dull yellow green.
Okay, that made sense to me.
People are going to collect to the catalogue that makes sense for them. Or perhaps more than one catalogue. A few are going to look everywhere for tidbits of additional information. They're going to read 80-year-old journals from specialist societies to find nuggets of data that have otherwise been lost to time.
Put yourself anywhere on the continuum that makes you happy.