If a card comes back altered, the grader found a concern such as trimming, recoloring, restoration, rebacking, pressing, or another modification that prevents a standard numerical grade. The exact label and fee outcome depend on the company and service chosen. If you used a grading submission shop, ask for the full paperwork and whether the shop has any notes from intake. The result can be disappointing, but it is information you should preserve rather than hide.
An altered result affects resale because many buyers will discount the card sharply or avoid it entirely. It can still have value as an authentic but altered example, especially for rare vintage cards, but the disclosure must be clear. The altered and trimmed cards guide and authentication checklist explain common warning signs. If the card was recently purchased, review the seller’s return policy and keep every receipt, photo, and message. Do not crack and sell the card raw without disclosing the result, because that turns a grading disappointment into a trust problem.