how does the landlord know you turned in all the keys? There could be extras you or someone else had made and just waiting for some one else to move in and rob them and get entry with the key you or someone else made. Would you not feel better if you move into a apartments and you Knew it was just re-key and no one else had a key.

I’m baffled also. Because, usually you just have to turn in your key. I have not heard that landlords can charge you to change the locks. That’s their responsibility. I don’t believe it. I would check with the landlord-tenants laws in your state.

All lease modifications MUST BE IN WRITING and a lease can not be change during it’s term.
I would just not pay the charge and see what the landlord does. If he takes you to court, HE WILL LOOSE.

Yes please report him. Whether he changed the rules or not, your lease does not mention it. So he has no rights to charge you.

An amendment to WHAT a year ago? If it’s not in writing in your lease, it shouldn’t be charged.

Ask the housing office…

If it’s not in your lease, it doesn’t apply to you, period.
Moreover, a landlord is not obligated to re-key locks for a new tenant (except where thoughtful, generous landlords are concerned, re-keying is the tenant’s prerogative–but not responsibility), so it doesn’t make sense to charge you for something that they may not even provide to the next tenant, whether it’s in the lease or not. Given the condition in your lease is not outrageous, no court is going to uphold an extra fee contrary to what is in your signed lease.
As a landlord, I have never re-keyed my apartment, nor have the tenants asked for a re-key. As tenant, I know for a fact that the landlord charged the previous tenant for a re-key of my room, but did not actually re-key that lock, and he knows I’ll be damned if I’m paying for a re-key when I move out.