PSA Qualifiers Explained: MC, OC, PD, MK, ST, and OF Designations

What Is a PSA Qualifier?

A PSA qualifier is a two-letter code that appears on a graded card's label alongside the numeric grade. It indicates that the card has a specific, notable defect that would normally result in a lower overall grade, but that the card is otherwise in a condition that merits the stated grade.

For example, a "PSA 8 OC" means the card's corners, edges, and surface are all at an 8 level (Near Mint-Mint), but the centering is significantly off - bad enough that without the qualifier, the overall grade would drop below 8. The qualifier lets PSA assign the grade the card "deserves" on the non-defective attributes while transparently flagging the specific issue.

Qualifiers are PSA's way of providing more information without simply lowering the grade. They say: "This card would be an 8 in every respect except for this one particular problem."

The Six PSA Qualifier Codes

OC - Off-Center

The card's centering is significantly worse than the tolerance for the assigned grade. A card with PSA 9-level corners, edges, and surface but centering worse than 70/30 might receive "PSA 9 OC" instead of being dropped to PSA 6 or 7.

OC is the most frequently assigned qualifier and the most visually obvious - you can spot off-centering from across the room. Vintage cards are especially prone, making OC a common sight on older slabs.

MC - Miscut

Unlike simple off-centering (where the image is shifted but the card is a normal rectangle), a miscut card may show portions of an adjacent card, have an irregular shape, or be cut at an angle. MC is less common than OC because factory quality control catches the worst cases.

Some miscut cards are actually sought after by error collectors - a dramatic miscut showing two different cards can command a premium. For the general market, however, miscuts are value-negative.

PD - Print Defect

The card has a noticeable factory printing error - significant print lines, ink spots, color registration errors, or missing ink. A card with perfect handling but a prominent factory print line might receive "PSA 9 PD" rather than a straight PSA 7 or 8.

PD is moderately common. Some sets have higher rates of print problems, particularly Japanese-to-English Pokemon translations and early print runs. PD qualifiers are strictly for factory defects, not handling damage - understanding the difference between print lines and scratches is directly relevant.

MK - Marked

The card has a mark that is not a factory defect and not standard wear - writing (pen, pencil, marker), stamp marks, or sticker residue. Less common on modern cards but frequent on vintage cards where kids wrote names or shops marked prices on card stock. MK is arguably the most value-damaging qualifier because marks are human-caused damage rather than factory issues.

ST - Stain

The card has visible discoloration from liquid exposure, chemical contact, or other contamination. This differs from natural aging (not qualified) and from printing errors (which receive PD). Severity varies enormously - a faint water spot on the back versus a dark stain across the front both receive ST, but the market treats them very differently.

OF - Out of Focus

The card's printing appears blurry or soft compared to a properly printed version - a factory defect where the press was not properly aligned. OF is the rarest qualifier because out-of-focus printing tends to affect entire sheets, which factory quality control typically catches before distribution.

How Qualifiers Affect Value

The central question every collector asks about qualifiers: how much do they reduce value compared to a straight (non-qualified) grade?

General Discount Range

Qualified grades typically sell for 30-60% less than the equivalent straight grade. A PSA 9 OC might sell for 40-50% of what a straight PSA 9 sells for. The exact discount depends on:

• The qualifier type. OC and PD are the most "acceptable" qualifiers because they are factory issues. MK and ST are the least acceptable because they are post-factory damage.
• The severity. A barely off-center OC card is valued differently from a dramatically off-center one. A tiny PD print spot differs from a major print error. The qualifier does not communicate severity - only examination of the card reveals that.
• The card. For high-value vintage cards, qualifiers are more tolerated because the alternative (finding a straight grade) might be extremely difficult or expensive. For modern cards with abundant supply, there is little reason to accept a qualified grade.
• The grade number. A PSA 9 OC on a vintage card can still be desirable. A PSA 5 MK on a modern card is essentially unsaleable at a premium.

The PSA 10 Qualifier Question

Can a card receive a PSA 10 with a qualifier? Technically yes - a PSA 10 OC would mean the card is Gem Mint in corners, edges, and surface but has off-centering beyond PSA 10 tolerance. In practice, PSA 10 qualifiers are extremely rare, and the market treats them with suspicion. Most collectors view "PSA 10" as meaning flawless, and a qualifier contradicts that expectation. A PSA 10 OC might sell for less than a straight PSA 9.

Should You Accept a Qualified Grade?

When you submit a card and it receives a qualified grade, you generally have the option to reject the grade. The card is returned ungraded (you still pay the grading fee), and you can decide whether to resubmit, sell raw, or hold.

Reasons to Accept

• The card is vintage and straight grades at the same level are rare or prohibitively expensive
• The qualifier defect is mild and the card presents well overall
• You plan to keep the card in your personal collection and the grade is for personal reference
• The qualified grade still adds meaningful value over selling raw

Reasons to Reject

• The qualified grade reduces value below what the card would sell for raw
• Abundant straight-grade supply exists, making the qualified card difficult to sell
• You believe a resubmission (or submission to a different company) might yield a straight grade
• The qualifier stigma in the specific market (Pokemon, sports cards, etc.) is too severe

Resubmission Strategies

If you receive a qualified grade and believe the card deserves better:

Same company, new submission. Crack the slab and resubmit to PSA as a fresh submission. Grades are not linked between submissions - the new grader evaluates the card independently. There is no guarantee of a different result, and the new grade could be lower.

Different company. BGS and CGC do not use qualifier codes the same way. A card that receives a PSA OC qualifier might simply receive a lower centering subgrade at BGS (like a centering subgrade of 7 or 8) with a straight final grade. Some collectors prefer this because the grade appears "cleaner" even though the subgrade reveals the issue.

Pre-screen before resubmitting. If centering was the issue (OC or MC), measure it precisely before paying for another submission. If the centering truly is outside tolerance, a resubmission will yield the same result. ZeroPop's centering analysis can give you an objective measurement to base your resubmission decision on.

The Collector's Perspective

Qualifiers exist because not every card fits neatly into a single numeric grade. A card with PSA 10-quality corners, edges, and surface but badly off-center is genuinely different from a card that is mediocre across all attributes. The qualifier system communicates that distinction.

For beginners, the simplest rule is this: if you are buying, qualified grades represent potential value opportunities when the qualifier defect is mild and the discount is steep. If you are selling, qualified grades are harder to move and sell at meaningful discounts. And if you are submitting, careful pre-grading inspection that catches the specific defects flagged by qualifiers - centering, print issues, marks, stains - is the best way to avoid receiving one in the first place.