A sample written understanding between tenant and landlord

In Khulna city rent is agreed by word of mouth, and later disputes arise over advance payments or repairs. With no paper, nobody can prove anything. With help from someone who knows the law, make a one-page sample with spaces for rent, advance, repairs and notice period. Photocopy it and keep it at a neighbourhood shop. Both sides sign and keep a copy each. You need a helper, a one-page sample and some photocopies. For a big dispute, seek local legal advice.