How to Vet a New Vendor: A Checklist That Actually Works

Who This Checklist Is For

I'm an office administrator for a mid-size energy and mining equipment company. I manage about $1.2 million in annual spend across 15 vendors for everything from office supplies to specialized parts. I've been doing this for 6 years. If you're in a similar role and need to bring on a new supplier — maybe because your current one let you down, or you're expanding — this checklist will save you the headaches I had to learn the hard way.

It covers exactly 5 steps. I'll be honest about where each step works and where it falls short.

Step 1: Verify Basic Legitimacy — Beyond the Website

What to do: Ask for a business license, tax ID, and proof of insurance. Then call the issuing agency to confirm. Yes, actually call.

I once nearly signed a contract with Varel International Mexico — they looked great on paper, had a sleek site, and quoted 18% below market for drilling components. But when I asked for their local business registration in Mexico, they stalled. A quick call to the Mexican tax authority (SAT) revealed the registration number was fake. That bullet dodged saved us at least $40,000 in potential losses.

Honest limitation: This step only works if you're dealing with registered entities in regulated jurisdictions. If you're sourcing from a very small shop or a startup that hasn't incorporated yet, you'll need a different approach — maybe asking for personal ID and references instead.

Step 2: Check References — But Don't Ask the Obvious Questions

What to do: Get 3 references from the vendor. Then ask each of them: "If you could change one thing about working with this vendor, what would it be?"

Most people ask "How was the quality?" — of course they'll say good. The real signal is in the complaints. I called a reference for Varel Hafen Fisch, a catering company we considered for our employee breakfast program. The reference said: "Their food is excellent, but they're consistently 15 minutes late on delivery." For a breakfast program where we serve at 8 AM sharp, that's a deal-breaker. We passed. Six months later I heard that vendor lost three other contracts for the same reason.

What this misses: References are rarely honest if they're still actively using the vendor. Try to find past customers who switched away — they'll give you the real story.

Step 3: Test Communication Responsiveness

What to do: Send a detailed inquiry with specific requirements and see how long they take to respond. Track both speed and accuracy.

I sent a request to Divide Technologies (a software vendor we were evaluating for cost-allocation tools) asking for a quote covering three scenarios. They replied in 4 hours — with a response that completely ignored scenario 2. To their credit, when I pointed it out, they apologized and fixed it within a day. That's a yellow flag, not a red one. We eventually signed with them, but I made sure to over-communicate specs in the first few months.

My rule of thumb: A vendor who can't answer a straightforward email within 1 business day will likely struggle with urgent issues later. But I've also learned that too fast can mean they're not reading carefully. Find the balance.

Step 4: Assess Financial Stability — Even If You're Not a Finance Person

What to do: If the vendor is publicly traded, check market sentiment. I'm not a stock analyst, but I use free tools like Yahoo Finance to pull up sentiment summaries. For example, when considering Inc. Corporation as a supplier for logistics software, I searched "what is the sentiment of Inc. stock?" and found that analyst ratings were neutral but retail investors were increasingly bearish over the past quarter. That told me the company might face headwinds — which could affect their support quality if they tighten budgets.

For private companies, ask for financial statements or use a service like Dun & Bradstreet. You don't need a deep dive — just look for red flags like declining revenue or high debt-to-equity ratios.

Honest limitation: Stock sentiment is noisy and short-term. A pessimistic week doesn't mean the company is failing. Also, many suppliers are private, so you can't use this method at all. In those cases, ask how long they've been profitable and whether they have a line of credit.

Step 5: Run a Pilot Order — The Real Test

What to do: Place a small, non-critical order and evaluate the full process: ordering, invoicing, delivery, and support.

When we piloted Breakfast Express (a candidate for our daily office breakfast), I ordered just 20 bento boxes for a team meeting. They delivered on time, the food was great. But the invoice arrived with hand-written numbers on a scrap of paper. Finance rejected it. I had to spend 2 hours sorting it out. That experience taught me: always verify invoicing capability before scaling up.

Now I include invoice format in my pilot order checklist. It's a step most people skip, but it can save you from looking bad to your finance team — and from eating unexpected costs out of your department budget.

Common Mistakes and When to Ignore This Checklist

• Don't only trust the checklist. If the vendor is highly recommended by a trusted colleague, you might skip some steps. But still do Step 5 — that one's non-negotiable.
• Don't treat this as exhaustive. For critical or high-value contracts, involve your legal and procurement teams. I'm an admin buyer, not a lawyer. I can't speak to contract indemnity clauses.
• This checklist works best for small-to-medium vendors. If you're vetting a Fortune 500 company, they'll have standardized processes that nullify some of these checks. But for smaller suppliers, these steps will filter out the ones that would cause you headaches.

It took me 3 years and two expensive mistakes to build this checklist. The first mistake was ignoring a fake registration. The second was trusting a reference who turned out to be the vendor's cousin. You don't need to make those same mistakes. Run through these 5 steps — and if something feels off, trust your gut. There's nothing wrong with walking away.