This mixed-methods research aimed to understand the practices and perceptions of teachers regarding written feedback. For this purpose, a survey was administered to 150 teachers forming a non-probability sample, who were working in various universities in Karachi. The disciplines chosen for the study included nursing, applied linguistics, medicine and education departments in institutes of higher education situated in Karachi. Before sampling, initial screening was done to obtain a list of institutes which provide written feedback on students' assignments. Two homogenous groups of teachers by discipline (nursing and education) were then selected for focus group discussions. It was found that most teachers consider written feedback an important tool for guiding and helping students improve their work. In fact, they consider written feedback as important as verbal feedback. Teachers also recognized the importance of discussing the written feedback with the students but they rarely did so because of time constraints. Most teachers preferred to directly fix students' errors instead of providing feedback to enable them to correct those errors by themselves. While less than half of the participants used a checklist for grading, others used annotation. Several factors were found to have a great influence on the amount and quality of feedback. The most significant factor was whether teachers had formal training in providing feedback. Only 17% of the participants in this study had proper training to give written feedback. They also identified several environmental and personal factors that had an impact on their feedback practices including time, the relationship between the teacher and individual students, and, most importantly, the policies and culture of the institutes.