"Postage Due" is an original composition by Canadian jazz vocalist Caity Gyorgy from her 2020 debut album No Bounds, featuring guitarist Jocelyn Gould in a two-chorus electric guitar solo at a brisk 304 BPM. The uptempo ABAB' form in F showcases Gyorgy's skill as a composer who writes singable melodies that also function as compelling jazz vehicles. Gould's guitar solo navigates the rapid tempo with fluid bebop vocabulary, her clean tone and precise articulation reflecting the influence of post-bop guitar tradition. The track establishes the musical partnership between Gyorgy and Gould that would become a defining feature of Gyorgy's early recordings. At this extreme tempo, the 32-bar form cycles quickly, demanding real-time harmonic thinking from the soloist. Gould rises to the challenge with a solo that balances linear invention with rhythmic variety, maintaining swing feel even at a tempo that pushes the boundaries of comfortable improvisation. The recording launched Gyorgy's career as one of Canada's most promising young jazz artists, her compositions demonstrating a sophisticated understanding of jazz harmony and form that complemented her considerable vocal abilities.