I noticed some bills have an EPQ rating while others don't. Should one be cautious of bills without an EPQ rating? Is it possible that they was been washed or pressed, and that resulted in the lack of EPQ?
This is PMG's definition for EPQ..
PMG uses the designation Exceptional Paper Quality (EPQ) for notes that, in the opinion of PMG graders, are original. By original, we mean that a note has not been physically, chemically, or materially processed to lend the appearance of a higher grade. PMG graders examine the embossing, inks, and overall integrity of each note to make the determination whether it will qualify for EPQ. Notes exhibiting normal wear-and-tear for their respective grades are eligible; normal wear may include factors affecting grade such as counting marks and folds. Notes receiving the EPQ designation must furthermore be unrestored. A restored note has had non-original material added to bring its appearance to a known or assumed state.
For currency to grade Gem Uncirculated 65 or higher, it must also receive the EPQ designation. No note meeting PMG’s standards for the Gem Uncirculated grade can have had its appearance altered to achieve this grade, and thus the highest grade assigned by PMG without the EPQ designation is Choice Uncirculated 64. The minimum grade for which a note becomes eligible for the EPQ designation is Very Fine 30.
I believe that PMG once use to put the EPQ designation on the back of the note and now it is on the front....so if buying one without seeing it in person try to get a scan or pic of the back of the note to see if the EPQ designation appears there..
A "net graded" note is one which has had an adverse occurrence after it left the BEP. PMG will specifically state the reason(s) why any note is net graded. The PMG guarantee is not valid on any net graded note. A few reasons why a note may be "net graded" are tear, corner missing, repaired, re-embossed, washed, stained, ink or writing and PVC damage.
Hope this helps
FRIEDSQUID