What does a "DNC" grade mean?

I sent a couple of NGC graded Large Cents into PCGS for a crossover grade, but one of them has been designated as DNC.
What are my options if the coin can't be straight graded by PCGS? Does NGC have any type of grade guarantee?
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Comments
Did Not Cross
Did Not Cross
Did not cross?
Experience the World through Numismatics...it's more than you can imagine.
Did they return the coin to you in the original NGC holder? If so, your best option might be to sell it and find a PCGS coin.
I don't know yet if the coin will be returned in the NGC holder. If they removed the coin from the NGC holder, I assume that it will be shipped back in a body bag.
This is a discouraging development since I bought the coin at a recent Heritage auction.
I'm quite sure the coin would not be removed from the holder in a Crossover submission. At least not at NGC anyhow.
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It was a CrossOver submission, then should be okay. Here is the page and screenshot of how it works (note lower right for DNC or No).
https://www.pcgs.com/crossover

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RLJ 1958 - 2023
I didn't specify a minimum grade, but I thought that I designated that they grade the coin regardless.
Darn Nice Coin
If you leave the min grade blank, pcgs acknowledges that as being cross at same grade or higher. You would need to either write ANY in that blank space to have them cross to any straight grade, or write DETAILS to have them cross no matter what.
Did Not Cross doesn't mean there's a problem. It just means the NGC 64 is a 63+ or lower in the opinion of PCGS.
If you bought an NGC 64 (or whatever grade), you got exactly what you paid for and you still have exactly what you paid for. While it might be disappointing if you expected it to cross, it's really not that negative a result.
I'd call PCGS and inquire about your submission now. Sounds like you missed a checkbox and they did not cross at grade. You must specify cross at any grade. Sounds like they're coming back to you in their NGC holders.
...unless you paid PCGS money for the coin (which some dealers ask)...then there's disappointment...
https://pcgs.com/setregistry/showcase/2819
Whatever the specifics of the NGC grading guarantee, they don’t warrant that anyone else will agree with their opinion. The same goes for the PCGS guarantee.
Mark Feld* of Heritage Auctions*Unless otherwise noted, my posts here represent my personal opinions.
While DNC doesn’t necessarily mean the grading company thought there was an issue (such as cleaning, PVC, etc.) with the coin, it could mean that. Or, as you stated, it could just indicate that they didn’t think the coin merited the applicable minimum grade.
Mark Feld* of Heritage Auctions*Unless otherwise noted, my posts here represent my personal opinions.
@jmski52 I went down this road a ways before and I came the conclusion that NGC's guarantee is the the coin is graded per their standards. Just like PCGS they have a review program where you'd send it in and they'd make sure it's graded per their standards, but unless the problem is egregious (ie, grade off by 1.5 points or more), I wouldn't expect anything.
In my case I had NGC coins with very light hairlines that I believe PCGS would call cleaned but evidently acceptable to NGC, so it's likely that something other than the grade prevented the crossover. Evidently NGC's standards are a little looser on that kind of thing. I never did try to have my coins reviewed by NGC.
http://ProofCollection.Net
If your goal was to have a PCGS coin, that's the risk in buying non-PCGS coins. If you are concerned there is an issue (such as cleaning, PVC, etc.) an option is to send the coin either to CAC or CACG.
And waste more money to have them bag it or not sticker it? Shooting yourself in 1 foot happens with the grading game. Shooting both feet gets painful.
I'm sure forum veteran @jmski52 is well aware of the "risks" of buying non-PCGS coins. Yes in an ideal world you buy the perfect coin in the perfect (PCGS) holder at a fair price. But sometimes there are coins in other holders that for some reason or other are worth taking a chance on. I think it's a little insulting to ignore the main question which is about how NGC's guarantee applies or doesn't apply and focus on whether he should have purchased the coin or not and whether he should spend money on crossovers. I am 100% confident that @jmski52 has already considered all of this.
http://ProofCollection.Net
It was a Heritage auction, so he paid exactly what he chose to pay.
I'm glad you're defending the OP. But it's not so clear that the "veteran" considered any of those things or he would know what "Did Not Cross" means and that NGC does not guarantee PCGS opinions or vice versa. If he had anticipated all of the risks, would he now be asking how to mitigate those risks when it didn't cross?
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That assumes that the coin was not returned in the original NGC holder which is highly unlikely; BUT, anything can happen these days.
it's not so clear that the "veteran" considered any of those things or he would know what "Did Not Cross" means and that NGC does not guarantee PCGS opinions or vice versa. If he had anticipated all of the risks, would he now be asking how to mitigate those risks when it didn't cross?
I don't know how much of a veteran I am, but I have been a coin collector for 60 years. It's a great hobby.
I bought the coins at auction for my registry set. I considered the risk that an NGC coin wouldn't cross at the same grade but I didn't consider that PCGS would find a reason not to grade the coin. As I recall one of the primary justifications for professional third party grading was to facilitate "sight-unseen" trading but I also realize that grading is only an opinion.
I thought that I had completed the submission form to allow for grading even at a lower grade if necessary, but que' sera sera. Live and learn. I appreciate the discussion here.
And there is the possibility he based his bid on the PCGS price guide thinking it would cross. : )
And there is the possibility he based his bid on the PCGS price guide thinking it would cross. : )
Although I did some price guide research, I paid more attention to auction data from both GC and Heritage - and I didn't see anything in the auction photos that caused me any concern. Thank you for the comment.
Yes, but we can't blame the "dealer for that.
I don't think anybody is blaming Heritage for that.
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I went through this with an NGC AU55 1850 half. It did not cross because of an old cleaning under the toning. It was an ugly WB-4 with badly rusted dies, a mistake. Ms. Liberty looks like she lost an acid fight. I should have cracked it out of the NGC holder and sent it in.
Same thing with an ICG AU55 Hawaiian with nice toning and no hairlines. They apparently didn't like the toning and said it was cleaned. I'm still looking for a hairline. Sorry, I have no photos of this coin.
You might look at the post i responded to which actually said that that dealer ask is often the PCGS price. So, in fact, someone did say that which is the only reason I responded
The nice thing is Heritage makes five price guides available for auction bidders.
Greysheet. - CPG (Collector's Price Guidance) - CAC - Coin World - PCGS - NGC
The buyer makes the decision as to which price guide to follow, if any.
I put a minimum grade. Have no use for downgrades. Grading is subjective and a point in time.
Did not cross. My advice to you is don’t get too hung up on plastic. If you like the Coin, then it’s fine in an NGC slab.
Sometimes, it’s better to be LUCKY than good. 🍀 🍺👍
My Full Walker Registry Set (1916-1947):
https://www.ngccoin.com/registry/competitive-sets/16292/
I agree with @Walkerfan. Think about starting a Registry set at CACG. Actually, that's not a bad idea, last year I bought eight coins. Three of them were CACGs. Do you really want to past up those opportunities.
walker
That's smart. Missed opportunities only lead to regrets. I participate at NGC, b/c of it's inclusiveness. And you're RIGHT...CACG Registry is even BETTER.
I registered there last year. 
Edit to add: Some of my coins are in vintage NGC slabs and I'd NEVER want to lose those. Those coins will be stickered but slabs left intact.
Sometimes, it’s better to be LUCKY than good. 🍀 🍺👍
My Full Walker Registry Set (1916-1947):
https://www.ngccoin.com/registry/competitive-sets/16292/