All Rare US Coins, and most of the US Gold Coins by Date and US Gold Type Coins offered within this site have been certified for grade and authenticity by either Numismatic Guaranty Corporation (NGC), or Professional Coin Grading Service (PCGS). These coins are offered subject to the guarantees of the respective certification services as follows:
NGC guarantees that all coins submitted to it through any tier shall be examined by a minimum of three (3) NGC grading experts in accordance with NGC grading standards and procedures. In the event the purchaser of an NGC coin believes that the coin has been overgraded with respect to such standards and procedures, the purchaser may submit any such coin to NGC for a review of the assigned grade. If the grade determined under such review is lower than that originally assigned to the coin, NGC shall, at their option, either replace the coin or pay the difference between the current fair market value of the coin at the newly established grade and the current fair market value of the grade originally assigned to such coin.
WARNING: Oxidation can continue to occur after sealing. Copper coins are particularly susceptible to this and a coin's grade may diminish as a result. Therefore, the NGC guarantee shall not be applicable to copper coins. Guarantee applies only to those coins which we encapsulate. Clerical error with respect to the description or grade of a coin which would be readily noticed on inspection shall not be subject to the NGC guarantee herein stated.
PCGS guarantees that all coins submitted to it shall be graded in accordance with PCGS grading standards and under the procedures of PCGS.
In the event the purchaser of a PCGS graded coin believes that the coin has been overgraded with respect to such standards and procedures, he may submit such coin to PCGS for regrading under a procedure which insures that graders are unaware of the grade originally assigned.
If the grade determined under such regrading procedure is lower than that originally assigned to the coin, PCGS shall pay the difference between the highest then-current bid by a PCGS dealer for the coin in question at the newly established grade and the highest such bid for the coin at the grade originally assigned. PCGS will also refund the regrading fee and postage and insurance costs incurred by the coin owner in sending the coin to PCGS.
This guarantee shall not apply to any coin as to which an obvious clerical error has been made with respect to the description of the coin.