OP:
You have to decide if it is worth it for you to deal with this... I graduated from UNC in the mid 2000s and I lived in an apartment complex by the name of Timber Hollow for a year while I applied to med schools and finished up some undergrad requirements. I lived alone and rarely had anyone over. No pets and never any issues. It was a fairly monastic year for me.
I always thought the ladies in the office were nice, and the only time I ever saw them was to drop off my rent check each month or if they were out and about on the property. I was friendly.
I moved out on a Sunday, and there was no one in the office. Since I knew this was the case, I was instructed to put my keys in a special envelope that they gave me and drop it in the rent slot. I had very little furniture, so it took my father and I roughly two hours to move it all into a U-Haul, clean the apartment and drop off the keys. I remember doing a walk through to see if there were any marks on the walls, etc. Nothing, the place was pristine.
So about a month later I get a notice in the mail that I owe them $850 due to a destroyed carpet. I called because it was surely a mistake and the lady - same lady from when I was there - told me that I had ruined the carpet and that it had to be replaced. I said, "There is no way, I did a final walk through on my way out and it looked brand new. I even vacuumed before I left." She basically said, "Sorry" so I offered to come and see it to make sure it wasn't someone else's apartment or some other mistake. She just said that it had already been replaced and that she could send me pictures of the stains. I asked her to do so and she did: physical pictures in the mail. They were of a carpet with stains, up close. No way to tell if it was the carpet in my apartment.
I told them that I was going to hire a lawyer and they called my bluff. Basically said, "bring it on." I spoke with a lawyer friend of mine and he told me that it would cost me no less than $500 to take them to court and they would probably win. Plus, they were going to hit my credit report with it right away, and even if I won in court it would likely stay on my credit report.
So I gave them the $850.
Still burns me up a decade later. My guess is that they were short somewhere and saw me as a likely sucker since I moved out without a walk through. In subsequent apartments, I have demanded a walk through with the manager before and after the rental time, and I document all issues and have the manager sign. It sounds insane and OCD, I know...