Hi GaNinFl,
to ATP. I remember coming to ATP with my own NOID question, just like you. Though it can be really frustrating not knowing for sure what possibly registered daylily we each might have, we do all get used to having solid-color daylilies that are really good at evading any confident ID-ing.
If it is a daylily you hope to sell, then it is great to identify it as a NOID to avoid any misunderstandings. And, if it is to be just a home garden beauty, you can informally call it anything you like - people come up with lovely garden names for their NOIDS all the time.
And, they are very welcome to be formally included in the general daylily database page where they do not need to have a positive identity declared:
Daylilies (Hemerocallis)
That is quite a remarkably pretty yellow-gold, by the way - I usually do not like gold tones in yellows, but this one is an exception!
for the 
I hope you do stumble onto the paperwork, but if not, I don't think you'd have any trouble selling it as a NOID. Some of my favorite purchases have been NOIDs that have that special color, marking or pattern I just haven't seen elsewhere. I think that glowing gold-yellow, with your forthright declaration that it is NOID, would be awesome if you offer it for sale. So glad you are part of ATP now 
