Ask the freelancer to explain the work
People who participated meaningfully in a project can usually explain the original problem, their role, constraints, decisions and what changed during production.
Warning signs
Portfolio styles vary wildly without explanation.
The freelancer cannot describe their role in showcased projects.
Images appear copied from unrelated sites.
Client names cannot be connected to the claimed work.
Project descriptions stay generic when you ask specific questions.
Portfolio quality is dramatically higher than the freelancer's live test or current work.
Check public evidence when useful
For important projects, search for the work, client, credits or public case study. Not every legitimate project will be easy to verify, but available evidence strengthens the claim.
The portfolio is evidence, not a credential.Its value comes from showing relevant ability—not simply from existing.
Be careful with collaborative work
A freelancer may legitimately show work created by a larger team. Ask which parts they personally handled before assuming the whole project demonstrates their skill.