If you're reading this, it's probably not your first time hiring someone to build or rebuild your site. The question on your mind isn't "is this agency good." It's "am I about to make the same mistake again." That's a harder question, and most of the advice you'll find online doesn't actually answer it.
Most "agency red flag" checklists online read the same way: check their portfolio, look for good communication, read the reviews. None of that is wrong, exactly, but none of it can actually be verified before you sign anything. A portfolio can be curated. Reviews can be seeded. "Good communication" is a feeling you won't know you were wrong about until three months in.
There are two things about any agency that aren't feelings. They're facts, and both are checkable before you sign, not after.
Check One: Who Actually Owns the Site When It's Done
Most people assume that if they're paying for a website, they own it once it's built. That assumption is wrong by default, and it's not a gray area. Under U.S. copyright law, a website built by an outside contractor is legally owned by that contractor, not the client who paid for it, unless two specific conditions are both met: the work falls into one of the categories the law allows to count as "work made for hire," and there is a signed, written agreement that says so explicitly. This is the standard the U.S. Copyright Office lays out in Circular 30 on works made for hire, tracing back to Section 101 of the 1976 Copyright Act and the Supreme Court's ruling in Community for Creative Non-Violence v. Reid (1989).
In plain terms: a verbal assurance that "of course it's yours" means nothing here. A friendly sales call means nothing here. If the contract doesn't contain that specific written clause, the code, the design, and the content the agency built for you belong to them by default, and you're a customer of a site you don't legally own.
The check is simple. Before you sign anything, ask to see that exact clause. Not a summary of it, not "we always give clients ownership," the actual sentence in the actual contract. If an agency can't produce it, or gets vague when you ask, you already have your answer, and you got it before paying a dollar.
Check Two: How They Got You on the Phone
The second check isn't about the contract. It's about how the relationship started.
The Federal Trade Commission's guide on scams against small businesses documents a specific, named pattern that shows up constantly in complaints about web design, hosting, SEO, and directory-listing sales: manufactured urgency (pressure to act before you've had a chance to check anything out), invoices or demands tied to services the business never actually ordered, and a push toward payment methods that are hard to trace or reverse. This isn't a vague vibe. It's a documented pattern with a name, described directly in the FTC's own consumer guidance for small business owners.
To be clear: an agency calling you first doesn't automatically mean anything is wrong. Plenty of legitimate businesses do outbound sales. The pattern worth noticing is what happens after that first call: does the pitch lean on urgency instead of specifics, does anything reference a service or invoice you never actually agreed to, does the payment ask push toward something you can't easily dispute later. One of those alone might be nothing. Two or three stacked together is the exact pattern the FTC describes.
What This Replaces
Most of what ranks for "how to spot a bad web design agency" is built around soft signals: vague timelines, stock-photo team pages, a gut feeling about the sales call. None of that is useless, but all of it is subjective, and subjective signals are exactly what a mass-production shop optimizes around once enough people start checking for them. A polished portfolio and a friendly rep are cheap to fake. A written ownership clause and a documented pressure-tactic pattern are not.
That's the actual difference this article is arguing for: two checks with a real source behind each, instead of a longer list of things that feel reassuring but can't be verified until it's too late to matter.
Before You Sign Anything
Ask for the ownership clause in writing, and read it yourself instead of taking a summary. Notice how the relationship started, and whether the pitch that followed leaned on urgency or specifics. If either check doesn't hold up, that's the whole review. Everything else on the usual red-flag list is worth a look too, but these two are the ones you can actually confirm before you've paid anything.