Here's a January most dispensary owners know. Your bookkeeper is trying to close out 1099s and comes to you with a list: four vendors you paid all year, and not one of them ever sent a W-9. Now you're emailing brands you haven't talked to since spring, asking for a form they swear they already sent, while the filing deadline gets closer. None of it was anyone's fault, exactly. The W-9 just never got collected, because collecting it was always someone's side task and never anyone's actual job.
The same thing happens in the other direction. A new vendor won't ship until they have your resale certificate on file — the document that says you're buying for resale so they don't charge you sales tax. So you dig through a drive, find last year's version, email it over, and do the whole thing again the next time a vendor's system can't find it. Two forms, both routine, both quietly eating time and creating risk every time a new vendor relationship starts.
The two forms, and which direction each one goes
Vendor tax paperwork trips people up because the two main forms travel in opposite directions. It's worth being precise about who owes what to whom.
Your Vendor
Sends you a W-9
Encrypted vault
+ access log
You (Retailer)
Sign your W-9 + resale certificate
The W-9 comes from your vendor. It carries their legal name, address, EIN, and federal tax classification. You need it on file to pay them cleanly and to issue a 1099 at year-end. The resale certificate goes to your vendor. Called the ST-4 in Massachusetts and known by other names elsewhere, it certifies that you're buying for resale so the vendor doesn't add sales tax. One form in, one form out — and on most dispensaries' systems, both are handled by hand.
What it costs to do this on email and spreadsheets
None of these forms are hard. The cost is in the chase and the gaps. A W-9 that was never collected turns into a 1099 scramble in January. A resale certificate that lives in one person's inbox gets re-requested every time a vendor's AP system can't find it. And when a form does change hands over email, there's no record of who sent what to whom — so the question "do we have their current W-9?" can only be answered by someone going to look.
Email & spreadsheets
Every quarter
Blank forms emailed out, certificates re-sent on request, no record of who has what, and a 1099 scramble when a W-9 was never collected.
On ShelfSpace
Once
W-9 collected in the invite, your forms signed once and reused, both stored encrypted with a logged trail of every share.
How ShelfSpace handles it
ShelfSpace puts both forms on one system, so the exchange happens as a byproduct of onboarding instead of a separate chase. Here's the whole flow.
The vendor's W-9 is collected in the invite
When you onboard a cannabis vendor, the W-9 is built into the invite. The vendor enters their EIN and federal tax classification and submits the form in the same flow where they set up banking — no blank PDF emailed out, no signature to chase.
You sign your W-9 and resale certificate
Under Settings, the platform auto-fills your IRS W-9 and your state resale certificate from your business profile. You sign by typing your legal name — a valid electronic signature, no third-party tool to log into, nothing to print or fax. Run multiple stores? Sign once and apply it across the group.
Either side reveals what they need — and it's logged
You reveal a vendor's W-9 from their profile; a vendor reveals your resale certificate from yours. Every reveal records who looked, when, and from where, and notifies the other party. EINs stay encrypted and masked to the last four digits.
The forms stay on file
No more "can you resend your W-9," no lost certificate in January, and a clear record if a question ever comes up. When your accountant needs the forms at tax time, they're already there.
To be clear about what this is and isn't: ShelfSpace handles the collection, signing, storage, and sharing of these forms. It's not a tax-filing service — it doesn't generate or file your 1099s, and it doesn't check taxpayer numbers against the IRS. It keeps the right forms on file so the information is ready when you and your accountant need it. The full mechanics live in the vendor W-9 & tax forms documentation.
The W-9 that triggers a January scramble isn't a hard form. It's just one nobody was assigned to collect. Put it in the invite and the problem disappears.
It's a small thing that quietly compounds. Every vendor you bring on is one more W-9 to collect and one more resale certificate to share. Handle that exchange on the same system you use to onboard, pay, and reconcile with vendors, and tax forms stop being a task you remember at the worst possible time. They're just on file. See how it fits into cannabis accounts payable and vendor onboarding.
We'll run a free evaluation of your AP — including which of your vendors are missing a W-9 right now. No commitment, just a clear picture of what's on file and what isn't.