Here’s a list, accompanied by images, of coin grading company slabs you should avoid at all costs. If you don’t know much about grading coins (most of us don’t, even if we think we do) or can’t see a clear image, with which to grade the coin, then do yourself a favor and move on to better auctions.

I have read too many regret stories from collectors who didn’t know they were buying an over-graded coin. All of them thought that if it was in a professional looking holder then it must be graded properly. A few thought they were grabbing a bargain.

Note: Some of these holders might appear with a different design or label color, and might be sold by multiple ebay sellers. However, most are sold by a single ebay seller in large quantities.

INB International Numismatic Bureau
Coin grading services to avoid and not recommended - INB

NNC National Numismatic Certification

Coin grading services to avoid and not recommended - NNC

SGS Star Grading Service

Coin grading services to avoid and not recommended - SGS

ANGS American Numismatic Grading Service

Coin grading services to avoid and not recommended - ANGS

 NAC Numismatic Authentication Company

Coin grading services to avoid and not recommended - NAC

NCC Numismatic Collectors Company

Coin grading services to avoid and not recommended - NCC

 NES Numismatic Evaluation Service

Coin grading services to avoid and not recommended - NES

NPG Numismatic Professional Grading

Coin grading services to avoid and not recommended - NPG

CSI Certified Silver Investments

Coin grading services to avoid and not recommended - CSI

USGS US Coin Grading

Coin grading services to avoid and not recommended - USGS

No-Name Holders

Coin grading services to avoid and not recommended

You should avoid most no-name holders since they’re just coins graded by the person selling the coins, as are most over-grading coin companies and services. If you can’t see a clear and detailed image, without glare or “masking” angles and lighting then don’t bid on the coin, no matter what the holder label claims.