Things You'll Need
Instructions
Contact an independent coin grading service. Explain that you have what you believe is a rare coin and wish to have it certified for both condition and authenticity.
Follow the shipping instructions given to you by the grading service. Be sure to ship the coin in nondescript packaging and insure it adequately before sending it off.
Wait for the grading or certification process to be completed. Once you receive notification that this has been accomplished, you may ask to have the coin placed into a sonically sealed protective holder. This is particularly appropriate if your coin is verified as a numismatic rarity.
Pay the grading company for their services and wait for your certified coin to be shipped back to you. If your coin is judged to be a high-grade numismatic rarity, you may wish to store it in a secure location, such as a safe deposit box.