Be cautious of anyone promising a guaranteed visa, unusually quick decision or a specific outcome, as applications are decided by UK Visas and Immigration. Avoid advisers who suggest hiding information, submitting false documents, paying unexplained cash fees, or signing blank forms. Check that an immigration adviser is regulated by the Immigration Advice Authority or that a solicitor is regulated by the SRA, and ask for written terms, costs and a clear explanation of the work involved. You can also compare advice with the relevant guidance on GOV.UK before submitting your application.