Is it worth it to get 4 LOR's if possible?

[ImmunoXX]

I have three strong LOR's lined up, but have a good candidate for a forth. Most of my programs allow for more than three LOR's so should I go for 4? I realize some programs may only read 3, but I can't think of any downside to having 4..... Would it be a benefit at all?

[ecoevosale]

I have a total of six letter writers - some programs state a maximum number of letters (ex: minimum 3 but up to 5), so I'm submitting as many as I feel are appropriate for that program that is within their listed window. If they don't state a maximum, I've contacted the department or admissions (whichever deals with the applicant review in that program) and ask if there is a limit or preference.

Some places really don't want more to read, and others don't seem to mind - so I think it is just to your benefit to contact and make sure you're following the guidelines and preferences of the program's admissions committee.