Undergraduate (international first-year): DU lists an application (Common App) with an essay, the application fee (or fee waiver, if approved), official secondary-school transcripts (with certified English translations if needed), and at least one letter of recommendation; SAT/ACT can be optional depending on your situation, and proof of English proficiency (or exemption) is typically required. Some majors (e.g., music, art/design) may require an audition or portfolio, and an interview can be optional.
Graduate: DU lists an online application, a program-specific application fee (varies by program), transcripts from every college/university attended (plus certified English translations if needed), and possible supplemental materials such as letters of recommendation and admission essays/statements of purpose. International graduate applicants may also need English proficiency scores (or a qualifying exemption), and DU may require transcript evaluation steps for non-U.S. credentials and financial verification for I-20/DS-2019 processing.
From the GlobalScholarships DU recipient experience, Aisha Nazir emphasized application writing and recommendations as core documents in her Fulbright path (personal essay, research essay, and reference letters), and she later had to add standardized test results for the university stage.