Gold coin and bar inspection checklist

What to take away

• Inspection begins with the listing and seller evidence, not when the parcel is opened.
• Compare the item with an issuer-specific specification for its exact type, size, and year.
• Weight, dimensions, visual details, packaging, and security features are complementary checks.
• A passing home check does not prove authenticity; a conflicting check requires controlled escalation.
• Preserve an evidence trail before opening packaging or attempting any test that could change the item.

This checklist organizes a non-destructive first examination of retail gold bullion. It is not an authentication certificate and cannot replace a qualified examiner, assay, or proprietary mint system when those are needed.

Before ordering

• Record the seller's legal name, physical contact route, and written terms.
• Save the complete listing, price, timestamp, photographs, and stated condition.
• Identify the exact issuer, product, year, finish, denomination, weight, and fineness.
• Obtain an authoritative specification for that exact variant.
• Confirm whether a serial should appear on the bar, card, invoice, or all three.
• Ask whether opening a capsule or assay card changes the return right or buyback bid.
• Confirm carrier, insurance, signature, delivery deadline, and loss procedure.
• Prepare a calibrated scale, suitable caliper, clean surface, good lighting, and camera.

Specifications must be read carefully. The U.S. Mint's American Eagle Gold Proof specifications show why gross weight and fine-gold weight should not be confused: the one-ounce version contains one fine troy ounce while its alloyed gross weight is 1.0909 troy ounces. That page covers proof coins, so do not use its finish or packaging statements to identify a bullion-finish coin.

At delivery

• Photograph every side of the unopened shipping package.
• Record the label, tracking number, seal condition, damage, and receipt time.
• Open the shipment under continuous video if the value and privacy setting justify it.
• Retain the box, padding, invoice, label, and security materials until acceptance is final.
• Stop if the parcel is empty, wet, cut, resealed, materially damaged, or inconsistent with the order.

Do not post shipping labels, home details, serials, safe locations, or complete inventory images publicly. Evidence can be useful without advertising ownership.

Reconcile identity

• Match item count and product description to the invoice.
• Compare obverse, reverse, edge, orientation, typography, and date with the correct reference.
• Check hallmark, denomination, weight statement, fineness, and mint mark where applicable.
• Reconcile the serial across bar, assay card, invoice, and seller record.
• Look for misspellings, uneven characters, impossible dates, missing marks, or altered surfaces.
• Note capsule scratches separately from marks on the coin.

Lighting angle matters. Fine radial lines, reeded edges, relief, and reflective fields can look different in flat photographs. Inspect under diffuse and angled light without cleaning or rubbing the surface.

Measure without forcing a result

• Check that the scale reads zero and test it with an appropriate calibration mass.
• Record gross weight with unit and instrument resolution.
• Measure diameter, length, width, and thickness at consistent points.
• Compare tolerances only when the issuer publishes them.
• Repeat an unexpected result after checking the instrument and method.
• Do not file, drill, acid-test, bend, or scratch an item during initial inspection.

A small difference can come from instrument precision, capsule mass, measuring pressure, product tolerance, or a genuine problem. Record the raw reading before drawing a conclusion.

Check product-specific security

Security features are not universal. Some coins use micro-engraved marks, radial lines, latent imagery, or proprietary database matching. Some bars use serials, tamper-evident cards, or optical elements. Confirm which feature belongs on the specific year and format.

The Royal Canadian Mint describes radial lines, a micro-engraved security mark, and its dealer-operated image matching process on the Bullion DNA system page. It says the system covers Gold Maple Leaf coins dated 2014 and later and Silver Maple Leaf coins dated 2015 and later. A visual check by an owner is not the same as verification with the authorized device and database.

Treat tests as an evidence ladder

Start with identity, records, weight, dimensions, and careful visual inspection. If uncertainty remains, a qualified dealer or laboratory may use electrical conductivity, ultrasound, X-ray fluorescence, specific-gravity methods, or other tools appropriate to the product.

Every method has limits. Surface composition can differ from the core. Packaging can obstruct a reading. Calibration, geometry, operator method, and comparison standards affect results. One passing test should not overrule several serious conflicts.

Quarantine and escalate

Stop the transaction workflow when:

• The serials disagree or appear altered.
• Weight or dimensions remain outside a reliable specification after rechecking.
• Design or security features do not match the correct year.
• The package appears substituted or resealed.
• Two sound methods produce conflicting results.
• The seller pressures the buyer to ignore evidence or miss a dispute deadline.

Keep the item, packaging, and documents together in controlled storage. Contact the seller in writing, state observable facts, preserve deadlines, and request the promised remedy. Use an independent qualified examiner when needed. Do not return a high-value item without documented authorization, tracking, insurance, and custody terms.

Close the inspection record

• Save unedited photographs and measurements.
• Record instruments, dates, operator, and test conditions.
• Attach any dealer or laboratory report.
• Note acceptance, return, replacement, or unresolved status.
• Update the private inventory and storage record.
• Keep a separate backup without unnecessary location detail.

Common questions

Can a magnet authenticate gold?

No. A magnetic response can identify some wrong materials, but a nonmagnetic result does not prove composition.

Should I remove a minted bar from its assay card to weigh it?

Not before checking return and resale consequences. Use the product's intended verification route and escalate uncertainty without casually damaging packaging.

Does a matching serial prove a bar is genuine?

No. It is one useful consistency check among seller provenance, construction, measurements, security, and appropriate testing.

What should I do with an inconclusive result?

Quarantine the item, preserve evidence and deadlines, and obtain independent qualified examination rather than guessing.