Design Principles
Trust Signals
Visitors need visible proof you're who you say you are, and that it's safe to deal with you.
Where it comes from
The principle is grounded in Nielsen Norman Group's long-running research into web credibility, which links a site's trustworthiness to its design quality, its openness, the currency of its content, and its connection to the wider web.
Why it matters for your website
Trust is a precondition for conversion. Visitors can't inspect you in person before committing, so they rely on visible signals — real faces, credentials, reviews, guarantees, recognisable logos — to decide whether to trust you. NN/G's research ties web trust to design quality, up-front disclosure, current content, and connection to the wider web. Pages missing these leave visitors to fill the gap with doubt.
On the web, the buyer can't shake your hand, visit your premises, or read your face — so they substitute visible proxies for trustworthiness, and in their absence the default assumption is caution, not goodwill. Trust signals are how you give a stranger reasons to believe before they commit.
The signals are concrete and cumulative: real faces and named people, reviews and testimonials, security and payment cues at the point of payment, recognisable logos, clear contact details, and up-to-date content. No single one is decisive, but their collective presence (or absence) quietly settles the visitor's verdict.
Wrong vs right
A checkout that asks for card details with no security cues, no company information, and no reviews — leaving the visitor to supply the doubt.
Recognisable payment and security signals at the point of payment, plus visible company details and proof, so committing feels safe.
An 'About' page with no real people, no address, and stock everything, giving no evidence there's a real business behind it.
Real faces, named team members, genuine contact details, and current content that signals a real, accountable organisation.
Outdated content, broken links, and a copyright date from years ago, all quietly signalling neglect.
Fresh, maintained content and working links that signal an active, trustworthy operation.
Understanding Trust Signals
Trust signals are the visible cues that tell a visitor it's safe to deal with you — that you're who you claim to be and will do what you say. Because a web visitor can't inspect you in person, they rely on these proxies to decide whether to commit, and Nielsen Norman Group's credibility research ties web trust to four things in particular: design quality, up-front disclosure, current content, and connection to the wider web.
The signals themselves are familiar and concrete: real human faces, named people and clear contact details, customer reviews and testimonials, security and payment cues, recognisable client or partner logos, guarantees, and visibly maintained content. Each addresses a slightly different doubt, and together they build a picture of a legitimate, accountable organisation.
Their absence is not neutral. Where a trust signal should be and isn't, the visitor fills the gap with doubt — and doubt, at the moment of commitment, is what abandonment is made of. Crucially, the signals must be genuine; faked badges or invented reviews fail the moment they're scrutinised. It connects to the hierarchy of trust, the authority principle, and the ABI trust model.
How Kweri checks it
Kweri can check for the presence and placement of many trust signals — security and payment cues near the point of payment, visible contact and company information, reviews and testimonials, real imagery, current content — and flag where the page asks for commitment without first establishing credibility. What it can't verify is whether those signals are *genuine*: a badge can be displayed without being earned. So Kweri reliably surfaces missing or poorly-placed trust signals and prompts you to add real ones, while the authenticity of what you display remains your responsibility.
FAQ
What are trust signals on a website?
Trust signals are visible cues that show a visitor it's safe to deal with you — real faces, reviews, security and payment cues, recognisable logos, guarantees, clear contact details, and current content. They substitute for the in-person checks a visitor can't make.
Why are trust signals important for conversion?
Because trust is a precondition for commitment, and online visitors can't inspect you directly. Without visible proof you're legitimate, they fill the gap with doubt — and doubt at the point of commitment is a leading cause of abandonment.
What makes a website trustworthy according to research?
Nielsen Norman Group's credibility research links web trust to design quality, up-front disclosure, current content, and connection to the wider web. Sites that look professional, are open, stay current, and connect outward earn more trust.
Where should trust signals go?
Near the decisions and doubts they address — security cues at the point of payment, reviews beside the offer, contact details and company information where legitimacy matters. A signal buried in the footer does little at the moment of commitment.
Do fake trust signals work?
Not durably. Invented reviews, unearned badges, or fake logos fail the moment a visitor scrutinises them, and the discovery damages trust in everything else on the page. Trust signals only work when they're genuine.
Related principles
Trust is not binary — it is staged. Users must have lower-level trust needs met before they will commit to higher-level ones, and demands that outpace the trust already established cause abandonment.
People look to what others do and say to judge the right course of action, especially when unsure.
At every point where a user is asked to commit — enter card details, hand over an email, start a free trial — a predictable anxiety spike occurs; unaddressed, it is the direct cause of the majority of checkout and sign-up abandonment.
Perceived trustworthiness is shaped by three independent dimensions: ability (can they do what they claim?), benevolence (do they care about my outcome, not just their own?), and integrity (will they behave honestly and transparently?). A page that fails on any one dimension fails the trust test.
Attribution & sources
Identified by Nielsen Norman Group. Catalogued from Nielsen Norman Group — Trustworthy Design.
Grounded in NN/G's research on web credibility and trust; the linked article is the reference used here.
See Trust Signals on your own site
Run a free Kweri audit — a plain-English review of your site’s speed, accessibility, SEO and design, ranked by what to fix first. No login, no jargon.
Run a free audit →