If PMG or any grading service grades a note as Choice Fine 15, for example, and they comment “stain”, does the stain factor into the grade? Or is is the note valued less than another same note graded 15 with no stain?
It is worth less than a banknote F-15 without stain. But in lower grades, most banknotes have at least 1 imperfection like small tear, hole...
+1
Most grading companies won't normally attribute a note with the adjective "choice" if it has a stain (or any issue). Usually you would call it "Fine with stains." A "choice" Fine should be Fine 12 to 18
sans stains, tears, graffiti, etc. All "choice" notes should have decent eye appeal & stains typically detract from that.
However, having said that, I am sure you will find some PMG notes with "Choice" + some extra issue since there's been many certifiers employed by PMG over the years who have certified millions of notes. When the numbers of certifiers reach that high, you're bound to have inconsistencies. One of the grades I have become quite wary of is PMG VF20 because I've seen real grimey looking VF20 rags that I would not give a F-12 to. Always try to buy the note (not the holder).
TPG* is quite subjective b/c the certification involves people making judgements using a sliding scale. It's bound to be imperfect.
The most important attribute a collector should seek when shopping for a circulated
TPG note is to get a "
Q" from PMG or an "
Original" note from
BCS. Notes without "
EPQ" can be washed, pressed & processed considerably. It may look like a VF30 now but it could have been a VF20 rag before some shady seller soaked in some soapy suds. Or it may have a pinhole, pen mark, knick or some other impairment. Certifiers no longer list all the issues these days. You really throw the dice when buying a note without
EPQ or
Original designation. Most
non Q notes will sell much cheaper than
Q notes as well (unless we're talking scarcer series like early Chartered banks, etc).
*TPG: Third Party Grader (or certifier)
PMG Paper Money Guarantee (US certifier)
BCS Banknote Certification Services (CDN certifier)