{"title":"A cannabis COA checklist for wholesale buyers","url":"https://www.weedshelf.net/guides/buying/cannabis-coa-buyer-checklist","json":"https://www.weedshelf.net/guides/buying/cannabis-coa-buyer-checklist/data.json","kind":"editorial","audience":"buyers","question":"What should a dispensary buyer check on a cannabis COA?","answer":"Match the report to the offered batch, confirm its issuer and dates, read results with their units, and ask the supplier to resolve missing or inconsistent information.","lede":"The first question about a lab report is whether it belongs to the product you are buying. Match the batch on the wholesale offer with the report, then review the dates, result units and any missing information before comparing products.","introduction":["A certificate of analysis, usually shortened to COA, records laboratory results for a submitted sample. This guide helps a purchasing team organize that document alongside the supplier’s offer.","It is a commercial document checklist. State testing requirements and acceptance thresholds belong to the relevant regulator and your licensed operation’s procedures."],"contentFormat":"markdown-inline","sections":[{"id":"section-match-the-report-to-the-offered-batch","url":"https://www.weedshelf.net/guides/buying/cannabis-coa-buyer-checklist#section-match-the-report-to-the-offered-batch","heading":"Match the report to the offered batch","blocks":[{"kind":"p","text":"Start with product and sample information. Metrc’s [public COA guide](https://www.metrc.com/learn-to-read-a-cannabis-certificate-of-analysis-with-confidence-see-how-retail-id-makes-access-easy-and-builds-trust-for-safer-informed-cannabis-choices/) identifies product name, lot or batch number, sample date and testing facility as useful matching fields. A familiar strain name alone is not a batch match."},{"kind":"table","caption":"Match the document to the purchase","columns":["Record","Compare with","Question to resolve"],"rows":[["Product description","The wholesale quote and product label","Is this the same product and format?"],["Batch or lot reference","The supplier’s offered batch","Does the report cover the goods offered?"],["Report and sample reference","The issuing lab’s document","Is this the complete report for this sample?"],["Testing facility","The issuer named on the report","Can an unexplained discrepancy be checked with the issuer?"]]},{"kind":"p","text":"If the supplier substitutes a batch after the quote, revisit the document match. Keep the agreed batch and corresponding report together in the purchase record so that receiving staff can follow the same reference."}]},{"id":"section-read-the-dates-for-what-they-describe","url":"https://www.weedshelf.net/guides/buying/cannabis-coa-buyer-checklist#section-read-the-dates-for-what-they-describe","heading":"Read the dates for what they describe","blocks":[{"kind":"p","text":"Sampling, testing, report issue, harvest and packaging dates describe different events. A recently issued report does not establish a recent harvest. Ask for the relevant production and packaging information separately when it matters to the purchase."},{"kind":"p","text":"Check whether the document is a revision and whether the supplier has a newer version. Read amendments before treating an older attachment as the current record. This guide sets no universal expiration period for a COA."}]},{"id":"section-keep-result-units-and-product-formats-aligned","url":"https://www.weedshelf.net/guides/buying/cannabis-coa-buyer-checklist#section-keep-result-units-and-product-formats-aligned","heading":"Keep result units and product formats aligned","blocks":[{"kind":"p","text":"Read the result label and unit together. A percentage, an amount per serving and an amount per package use different denominators. Confirm the basis before comparing a label with a report or placing two supplier offers side by side."},{"kind":"table","caption":"Document differences worth clarifying","columns":["What you see","What to ask"],"rows":[["A number without a clear unit","What unit and product basis does this result use?"],["A label value unlike the report value","Which reported result supports the label, and for which batch?"],["A test or profile omitted from the document","Was it performed, and is there a separate report?"],["A result marked not tested or not reported","What information is available before this purchase proceeds?"]]},{"kind":"p","text":"Keep comparisons within the same product format and measurement basis. A high potency figure alone does not answer whether the item fits your assortment, price point or customers’ purchase history."}]},{"id":"section-resolve-missing-information-before-committing","url":"https://www.weedshelf.net/guides/buying/cannabis-coa-buyer-checklist#section-resolve-missing-information-before-committing","heading":"Resolve missing information before committing","blocks":[{"kind":"p","text":"Ask for a readable, complete document. A cropped potency screenshot can leave out the sample identity, dates or other reported results. A missing attachment does not explain whether testing occurred; it means the purchasing record is incomplete."},{"kind":"p","text":"Describe the specific discrepancy to the supplier and keep the answer with the quote. For example: “Please confirm that this report covers the batch offered and send the complete current document, including any amendments.” An unresolved mismatch is a reason to hold the purchasing decision for review."}]},{"id":"section-carry-the-match-through-receiving","url":"https://www.weedshelf.net/guides/buying/cannabis-coa-buyer-checklist#section-carry-the-match-through-receiving","heading":"Carry the match through receiving","blocks":[{"kind":"p","text":"Make the agreed product, batch and document accessible to the person receiving the order. Check the delivered goods against that record and document any substitution or discrepancy through your operation’s receiving process."},{"kind":"p","text":"The report supports evaluation of the tested sample. It does not replace checking the delivery’s condition, storage information or agreed commercial terms. Keep those checks visible beside the unit-price comparison."}]}],"scope":"Wholesale buying guide","evidenceDateKind":null,"observed":null,"captured":null,"revised":"2026-10-17","published":"2026-09-22","facts":[],"constants":[],"faq":[{"question":"Is a matching strain name enough?","answer":"No. Confirm the product format and batch or lot reference. The same strain name can appear on different batches."},{"question":"Does a new report date prove the product is fresh?","answer":"No. Report, harvest and packaging dates refer to different events. Ask for the relevant dates and storage information separately."},{"question":"Is an omitted test the same as a passing result?","answer":"No. Ask whether the test was performed and request the applicable record. Do not fill a missing field with an assumption."},{"question":"Can I compare every potency number directly?","answer":"Only after confirming the result’s meaning and units. Percentage, per-serving and per-package figures do not share a denominator."},{"question":"Does this checklist establish whether a product can legally be sold?","answer":"No. Follow the applicable regulator’s requirements and your licensed operation’s procedures. This checklist organizes the documents used in a buying decision."}],"sources":["[Metrc: how to read a certificate of analysis](https://www.metrc.com/learn-to-read-a-cannabis-certificate-of-analysis-with-confidence-see-how-retail-id-makes-access-easy-and-builds-trust-for-safer-informed-cannabis-choices/), reviewed September 22, 2026. Public product, sample and result definitions only.","WeedShelf editorial purchasing checklist. No private lab results, customer records or state-specific acceptance thresholds are published."],"citation":"WeedShelf, \"A cannabis COA checklist for wholesale buyers\", revised 2026-10-17, https://www.weedshelf.net/guides/buying/cannabis-coa-buyer-checklist","canonical":"https://www.weedshelf.net/guides/buying/cannabis-coa-buyer-checklist","howToCite":"Cite WeedShelf and the canonical page URL with the revised date; with a market figure, keep its observation or capture date, coverage and the named underlying source.","methodology":"https://www.weedshelf.net/methodology","publisher":{"name":"WeedShelf","url":"https://www.weedshelf.net","@id":"https://www.weedshelf.net/#organization","description":"WeedShelf is wholesale cannabis menu software for licensed cultivators, built on METRC: it turns a cultivator’s METRC inventory into a live wholesale menu with one private link per dispensary and shows which buyer opened it, what they viewed and what went into the cart.","contact":"info@seedlink.net","methodology":"https://www.weedshelf.net/methodology"}}