关于提交超过三封推荐信的问题

之前看到有同学问如果想交4+封推荐信可不可以？会不会提高录取几率？DUKE的FAQ里面有这个问题，官方答案如下：
We strongly discourage you from requesting more than the required number of recommendations unless the department to which you applied has asked to see additional recommendations. Rather than improving your chances of admission, an excessive number of recommendation letters may actually cause application reviewers to view your file unfavorably.
当然每个学校可能不一样，具体问题要具体分析，不过还是建议大家严格按照网申的要求来提交材料。

分学校和系。有个学校的小秘和我说他们系至少要三封推荐信，上限十封，多交完全不影响。听口气感觉反而是鼓励多交。但是该学校另一个系就直接在网上说最多三封推荐信。