How do you dispute a security deposit refund?

You will need to talk to the manager or assistant manager of your apartment building; usually one or both of them will deal with deposits and damage charges. You're entitled to a statement saying exactly what you're being charged for; if you didn't get one, ask to see one. Also ask that they get out your inspection sheet from when you moved in, if you filled one out. You will need documentation to back up your claim: good quality photos are the best.

DO NOT GET ANGRY. Landlords deal with angry people talking about money all the time and it will make them not want to actually listen to you. Be calm and reasonable. Know exactly what you want to discuss and stick to it. Don't talk about problems you had with them three months ago, unless it's relevant to your dispute - for example if they're charging you for something that wasn't your fault and that you'd requested to be fixed.

Also, do not deposit the refund you received until you resolve your dispute one way or the other. Be prepared for it to take some time to get a new check.

In the future:
-Fill out all inspection sheets exactly. Document EVERYTHING. If there isn't one on the sheet, ask for a copy of the floor plan so that you can document carpet stains and wear.

-Take pictures of all damages. Every carpet stain, every mark on the wall. Take pictures before and after you move in so that you are easily able to compare them.

-Have someone who is not related to you go with you to look at the apartment before you take possession of it, and also have the same person look at it after you move out. If you have to go to court, a witness is much more reliable if they aren't a relative or a close friend.

-Ask for copies of all work orders you request. When you request service, document time and date, who you talked to, and how long it took the service to be done.

-Don't let things go. Be persistent in following up. If damage is ever caused by maintenance personnel, deal with it promptly rather than in a week. Take pictures.

-When you move out, take the time to do a walk-through with the manager or assistant manager. Take care of anything they mention. If they say anything relating to money, like, "Oh, this is good, you won't be charged for cleaning," GET IT IN WRITING AND SIGNED, AND GET A COPY.