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The Difference Between Appraisal, Authentication, and Grading

Three distinct services with three different purposes — and the most common ways collectors confuse them.

Published March 25, 2026Updated May 20, 20261 min read

Short answer

Appraisal answers "what is it worth?" Authentication answers "is it real?" Grading answers "what condition is it in?" The three are separate services with separate professionals — and confusion between them is the most common collector mistake.

Appraisal

  • Question answered: what is it worth?
  • Done by: certified appraisers (ASA, ISA, AAA credentialed).
  • Format: written, signed report.
  • Use cases: insurance, estate, divorce, charitable donation, IRS reporting.
  • Cost: flat fee, never a percentage of appraised value.

Authentication

  • Question answered: is it real?
  • Done by: third-party authenticators (PSA/DNA, JSA, BAS).
  • Format: COA, LOA, hologram, slab label.
  • Use cases: selling, insurance scheduling, buyer confidence.
  • Cost: by item, by service level.

Grading

  • Question answered: what condition is it in?
  • Done by: PSA, BGS, SGC, CGC.
  • Format: numeric score in a tamper-evident slab.
  • Use cases: cards, comics, signed flats.
  • Cost: by service level + declared value.

Where collectors confuse them

  • Asking an authenticator for a value.
  • Asking a grader to authenticate non-graded items.
  • Asking an appraiser to authenticate signatures (a separate skill set).
  • Trusting an estimate from someone whose business is buying the item.

Each service stays in its lane. Cross the streams and you get bad information.

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