First, the recipients are different. Offer is the admission notice from the university, and COE is the notice from the university to the Australian Immigration Bureau after you have paid the tuition fee, and the object is the Immigration Bureau.
Second, the two documents have different purposes. Offer means that the school tells you which major has accepted you, how long you want to study, whether you are exempt from classes, how much tuition and other fees you have to pay first. The school's refund policy is generally included in the admission notice, or a separate document is given to you together with the offer. COE is the school that informs the Immigration Bureau that students want to take this course, how much tuition and medical insurance they have paid, and the course ends on the day it starts. Please ask the Immigration Bureau to approve your visa.
Third, the numbers of the two documents are different. Offer can be a package offer, that is, combining two or more courses and giving you an admission notice. For example, put English and the main course together, or put the preparatory course and the undergraduate course together, and so on. However, COE should have a COE in every course, that is, there should be a COE in English class and a COE in the main course, but not in both courses.
Fourth, there are differences between the two kinds of file quantity restrictions. Generally speaking, there is no limit to the number of offer provided by schools, but there is a limit to the number of COEs. The Immigration Bureau stipulates how many overseas students each school can enroll, and schools can only set up COEs according to this number. Each COE has its own unique number. If the school is full, you can't send COEs anymore. If you need to apply for studying in Australia, please consult New Oriental about going abroad in the future. Receive the White Paper on Studying Abroad in 2022 for free.
Want to know more about studying in Australia, I suggest going abroad to choose New Oriental in the future. The company has a high-quality, high-efficiency and highly specialized consulting team, which brings together a group of senior consultants with rich experience in studying abroad. Most of them have overseas study background, and more than 80% have master's degree or above. In addition, the company also has a study abroad think tank composed of successful models in China, professors from famous overseas universities and career study abroad planning teachers to provide guidance and support for students. If you need to apply for studying in Australia, please consult New Oriental about going abroad in the future.