Letters between landlord, tenant and society
Most quarrels over rented homes come from things that were said but never written. A dated letter fixes that. Keep it factual: the address, the dates, the amount, and what you are asking the other person to do. Deliver it in a way you can prove later, such as by hand against a signature, by registered post, or by email.
Your rent agreement is the first authority. Read its clauses on notice period, deposit and repairs before you write, and quote them.
Declarations and affidavits
A self-declaration is a statement you sign yourself. An affidavit is a statement sworn before a notary or a magistrate, usually on stamp paper. They are not the same, so ask the office which one it wants.
The drafts here use general wording. Offices often have their own format, and stamp paper values differ by state. For anything that involves property, money or a dispute, show the draft to a lawyer.
Which paper do you need?
For something between you and one other person, such as a landlord, a tenant or the society secretary, write a letter or notice and keep proof that it was delivered. For something an office has asked you to state, ask whether it wants a self-declaration or an affidavit and whether it has its own wording. When someone else will act for you once, an authority letter is enough for simple jobs like collecting a document.
Keeping proof
The value of these papers lies in being able to show them later. Keep one file, paper or digital, with the rent agreement, every receipt, every letter sent and received, and photos of the house on the day you moved in and out. Write the date on everything. If you hand a letter over in person, ask the other person to sign and date your copy.
When a format is not enough
These drafts cover ordinary, friendly situations. A dispute over a deposit, an eviction, a property share, or anything where the other side has a lawyer, needs advice for your own case. A general format cannot know the terms of your agreement or the law of your state.