Credibility Best Practices

Chapter 09, Design Optimization Series

The key question: Does your design include cues that enhance trust?

Trust in advertising is built gradually, lost quickly, and, if broken, is extremely difficult to win back. Small design decisions that might seem inconsequential during production can have a meaningful effect on whether a viewer trusts what the design is communicating.

Fine print legibility

One of the most consistent credibility concerns in both digital and print is “fine print” that cannot be read at normal viewing sizes and conditions. When viewers notice text they cannot decipher, the most common interpretation is that the information is being intentionally obscured. Fine print that serves a legal or transparency function should be set at a genuinely readable size, written in plain language, and accessible in digital formats. It should also be accompanied by a clearly labeled path leading to full terms when the ad itself does not have room for them.

Substantiation of claims

Broad superlative claims invite scrutiny from an audience that is increasingly informed and appropriately skeptical. Statements presented without supporting context ask the viewer to simply accept them — and many will not. When a claim is important enough to feature prominently, it’s worth asking whether a brief qualifying mechanism, a citation, or a reference to a verifiable proof point can accompany it. A short phrase that provides a basis for the claim often does more to build credibility than the claim alone.

Completeness of promotional terms

Promotions without expiration dates can feel less time-bound and leave viewers with unanswered questions about the offer. Offers that reference qualifying conditions without a path to understanding what those conditions are often leave the viewer with unresolved questions. In print, where there is no interactive option, including complete terms within the piece itself is the only viable approach.

QR codes in print

QR codes are a useful tool for bridging print and digital, but they should never be the only available response path. Research and in-field observation consistently show that a meaningful portion of audiences remain unfamiliar with QR codes, skeptical of them, or simply lack the inclination to scan them. A QR code should always be accompanied by a visible URL so that viewers who prefer to type an address have that option. Relying on a QR code as the exclusive means of communicating additional information or taking the next step excludes a portion of the audience from participating.

Consumer-facing copy and internal language

Copyright notices, legal disclaimers, and attribution lines that use organizational abbreviations or internal shorthand can read as confusing or suspicious to a viewer without organizational context. If copy will be read by consumers, it should be written for consumers. Abbreviations should be spelled out, and jargon that is not self-explanatory to a general audience should be replaced with plain language.

Overall design polish

The perceived quality of design execution affects how your brand and offers are perceived. Dated typography, cluttered layouts, low-resolution imagery, and visual inconsistency across a piece all contribute to an impression of lower professionalism. This matters for credibility because viewers use visual quality as a proxy to assess brand quality and offer legitimacy. Design that looks carefully considered can strengthen the perception that the brand behind it is credible and detail-oriented. Design that looks rushed or poorly assembled can weaken that perception.

Response path friction

Every additional step required to act on a print piece reduces the likelihood of follow-through. Asking a viewer to write down a code, visit a URL, navigate to a specific page, and then enter that code is a four-step process. Reducing that chain to as few steps as possible — through mechanisms like pre-filled landing pages, short URLs, or single-scan QR code destinations — significantly improves the viewer's ability to act on the offer before their attention moves elsewhere.

The takeaway

Trust is easy to take for granted and very hard to recover when something undermines it. The good news is that most credibility concerns are fixable, and many of them are small. Legible fine print, substantiated claims, complete promotional terms, consistent design quality — none of these require a design overhaul. They require attention to the details that viewers notice even when they’re not consciously looking for them. Getting these right does not guarantee a viewer will act, but getting them wrong gives them a reason not to.​​

Series conclusion

Effective design is the result of many small decisions, each made thoughtfully and with the viewer in mind — not the team making them. There is no single formula that works across every product, audience, or channel. The best practices outlined in this series are a framework for asking better questions and catching the things that are easy to overlook when you are too close to the work.

One of the more persistent risks in design development is what might be called self-referential design, or producing a design based on the team’s own familiarity with the brand, product, or campaign, rather than on how a context-free viewer will encounter it. Stepping outside that familiarity — through viewer testing, structured expert review, or simply asking someone unfamiliar with the project to cold-interpret a design — is one of the most reliable ways to catch those gaps before they reach the audience.

Evan Cunningham is a Senior Researcher at Iridio℠ by RRD. Representing a strategic expansion of a design, data + analytics, technology, and media activation within RRD, Iridio is an integral part of RRD’s legacy and commitment to delivering performance-driven solutions that meet the evolving needs of our clients.