While general information on coins can be obtained from local coin dealers and clubs, reliable information on errors and varieties is not always as easily found. These services require the assistance of a professional who is well versed in this area of specialization.
The list of services below has been found to be reliable in this area and comes highly recommended. Prior to shipping any coins, you should always contact the location to receive shipping, packaging, return time and payment instructions. Many of the services will mail an information packet upon request that will contain all required information for submission. Websites are listed in alphabetical order.
AMERICAN NUMISMATIC ASSOCIATION, ANA
BRIAN RIBAR- Jefferson Nickels
Combined Organization of Numismatic Error Collectors of America (CONECA)
COPPERCOINS
ERROR-VARIETY READY REFERENCE
FACEBOOK PAGES
CopperCoins, Error-Variety News, Found in Rolls, Lincoln Cent Auctions, Variety and Error Coins and many more
FRED WEINBERG
THE IKE GROUP
JOHN A. WEXLER- All US denominations
KEN POTTER
LINCOLN CENT FORUM
MADdieclashes.com
Numismatic Literary Guild
ROTATED DIE COIN CENSUS
TRAIL DIES
UNITED STATES MINT
CONECA information files.