I have 3 30 day late payments on my student loan (Navient) from 2015 that I would like to dispute online with each of the credit bureaus. What reason should I select on the dispute form in order to ensure that the late payments are removed from my credit>
Never dispute online, it's irresponsible and lazy. If you have a real dispute, do it in writing, CMRRR via USPS. I've seen disputes go the wrong way because of online disputes being too restrictive.
Never dispute over the phone, it's even lazier. I've seen disputes go the wrong way because a phone rep coded the dispute in wrong.
30D lates don't mean much after 3 years, see my chart:
Note that these values aren't 100% accurate for 100% of people, but just averages I've tracked from many data points people share with me. 3 years after your lates, they barely count at all (25-30 points).