Tell your landlord
It should be stated on your renters agreement.
A letter for rent payment, especially a late rent payment or new amount should be sent registered and signed for so you can prove that it was delivered to the person owing the rent
You should contact your immediate supervisor as soon as you know that you are going to be late, and let that person know.
It depends on your landlord's requirements. Some offer a "grace period" after the day rent is due. If you pay your rent late, they are usually allowed to charge a late fee.
No interest should only be charged if you are in a mortgage.
"Pay today or stay away!"
This is likely a late rent payment letter. This type of letter is written by a landlord to inform a tenant that rent payment is late and should be paid as soon as possible. If you have paid your rent, you may want to contact you landlord regarding the possibility of it getting lost in the mail.
30 days
In NY, landlords can charge reasonable late fees to tenants who are late on their rent if this is disclosed in the lease agreement.
Though you might think it is alright to just pay your rent a little bit late, this is often a bad plan. It makes much more sense to give your landlord an indication of why you are paying it late. If there is a good reason for the late payment, a rent payment letter can help you avoid the fees associated with a late payment. You should write something that is straight forward and apologetic. It should give an acknowledgment of the late payment and indicate that you won't do it again. This will help prevent problems in the future and will give you some leeway.
No, unless you're moving out.
going to bed late