How to verify a marketing agency's results before you sign

To verify a marketing agency’s results, do five things before you sign: call two references, pressure-test their case studies for baselines and dates, ask for a live dashboard walkthrough, google the agency itself, and get account ownership in writing. Any agency with real results will pass all five without flinching.

This is the due-diligence step that comes after you’ve built a shortlist. If you’re still at the shortlist stage, start with how to choose a marketing agency in Dallas-Fort Worth, then come back here before you sign anything.

The stakes are simple. Verifying takes a week. Finding out six months in that the results were fiction costs you $1,000 to $3,000 a month for a single channel, or $2,500 to $6,000 or more for full-service, plus the customers you didn’t get while the wrong agency held your budget.

Ask for two references, then actually call them

Ask every agency on your shortlist for two current or recent clients you can talk to. Then make the calls. Most owners ask for references and never dial the number, which is exactly what a weak agency counts on.

An agency that hesitates here has already told you something. They have dozens of clients. If they can’t produce two who’ll say nice things, the nice things don’t exist.

When you get a reference on the phone, don’t ask “are you happy with them.” Everyone says yes to that. Ask these four instead:

• Did they deliver what they promised? Not “are they good,” but did the specific things in the pitch actually happen, on the timeline they gave.
• How did they handle it when something went wrong? Something always goes wrong. A campaign flops, tracking breaks, a launch slips. You’re hiring how they behave in that moment.
• Would you hire them again, knowing what you know now? A pause before the answer is an answer.
• What do you wish you’d known before starting? This is the question that earns the call. Happy references won’t volunteer the surprises, but almost everyone answers this one honestly.

Ten minutes per call. It’s the cheapest research you’ll ever do.

What are the red flags in a marketing case study?

The biggest red flag is a percentage with no baseline. “300% more leads” sounds impressive until you ask 300% of what. If the client was getting three leads a month, the agency tripled them to twelve. That might be fine for the client. It’s not fine as the headline proof in a sales deck.

Read every case study like a skeptic and check for four things:

• A baseline. What was the number before the agency started? No before means the after is meaningless.
• Dates. Screenshots with the date cropped out are cropped for a reason. A great month from 2019 is not evidence of what the agency can do now.
• A timeframe. “Doubled revenue” over what period? Ninety days is a result. Four years might just be the market growing underneath them.
• Money. The headline metric should be calls, booked appointments, customers, or revenue. If the proudest number an agency can show you is impressions growth, that tells you what they optimize for, and it isn’t your bank account.

None of these questions are rude. An agency with real results answers them in one email. An agency without them changes the subject.

Ask for a live dashboard walkthrough, not a PDF

Ask the agency to screen-share a real client account, anonymized, and walk you through it. Google Ads, Google Analytics, their call tracking, whatever they use. You want to see the actual platform with actual data, not a slide about it.

A PDF report can be assembled, trimmed, and polished into whatever story the agency wants to tell. A live account is much harder to fake. You’ll see real campaigns, real spend, real cost per lead, and, most importantly, whether they track calls and conversions at all.

While you’re watching, ask them to show you how a lead becomes a tracked number. Where does a phone call show up? How does a form fill get counted? If they can’t trace a customer back to the marketing on screen, they can’t do it for your account either. Our guide to tracking marketing ROI covers what that setup should look like, so you know what you’re looking at.

Client confidentiality is not a valid reason to refuse. Hiding a client’s name takes one minute. Hiding an empty account takes a story.

Google the agency itself

An agency selling local SEO should be findable in its own local market. Search “marketing agency” plus their city. Search their service plus their city. If they can’t rank themselves for the thing they’re charging you to do, that’s not a small irony. That’s the product demo failing.

Then read their Google reviews the way a customer would read yours:

• Volume and recency. A handful of reviews from three years ago suggests either few clients or few happy ones.
• What reviewers actually say. “Great to work with” is nice. “They cut our cost per lead in half” is evidence.
• How they respond to bad reviews. Every agency eventually gets one. A calm, specific response shows you how they’ll treat you when you’re unhappy. A defensive or absent response shows you that too. This is reputation management in the wild, and an agency that sells it should be good at it.

You’re not looking for perfection. You’re looking for an agency whose public footprint matches its pitch.

Get ownership in writing before you sign

Before you sign, get written confirmation of who owns four things: the ad accounts, the Google Business Profile, the website, and the data. The correct answer to all four is you.

This is the check owners skip most often, and the one with the worst failure mode. Here’s what should be in the agreement, in plain language:

• Ad accounts (Google Ads, Meta) are created under your email and your billing, with the agency added as a manager. If they leave, the account history, the conversion data, and everything the campaigns learned stays with you.
• Your Google Business Profile stays owned by you, with the agency as a manager. Losing your GBP means losing your reviews and your map ranking in one move.
• The website and its domain are registered to you. Some agencies “include” a website that lives on their platform, which means the day you leave, your site does too.
• Your data (contact lists, call recordings, analytics access) is exportable and yours at any time.

An agency that owns your accounts owns your exit. That’s not an accident. It’s a retention strategy, and it’s the difference between leaving a bad agency in a week and spending months rebuilding from zero. If you ever do need to leave, here’s how to fire your marketing agency without losing what’s yours.

Ask how they define success, and listen carefully

Ask one final question in the sales process: “Six months from now, how will we both know this worked?” Then say nothing and let them answer.

The right answer sounds like money. More calls, more booked appointments, a cost per lead you can live with, revenue you can trace back to the work. The wrong answer sounds like impressions, reach, engagement, and brand awareness. Those numbers describe activity, and activity is what agencies show you when outcomes aren’t there.

Ask to see a sample monthly report before you sign, and read it with that lens. We break down exactly which metrics belong in an agency report and which are filler. If the sample report leads with reach, that’s the report you’ll be squinting at in month four wondering where the customers are.

And if you skip all this and sign anyway? The failure has a predictable shape: vague reports, moved goalposts, and a renewal conversation that arrives before the results do. We wrote up the signs your marketing agency isn’t working so you can recognize it early. It’s a much better read now, as a preview, than later, as a diagnosis.

How we handle verification at BizVista

We built BizVista assuming every prospect would run exactly this checklist, because they should.

Our client results are published at /results/ with real numbers, not cropped screenshots. We work month to month, which means proving it never stops. There’s no contract holding you in place if the numbers go quiet, so the numbers can’t go quiet. And every account we build, from the ad accounts to the Google Business Profile to the website, is set up in your name from day one. If you ever leave, you leave with everything.

If you have a shortlist, run this checklist on all of them. Include us if you like. Book a free growth call and we’ll walk you through a live account, our reporting, and exactly how ownership works, before you’ve signed anything.