Paperwork to keep on file when raising rent

[Tracy Uscinski]

We are about to raise the rent on our rental unit. The tenants one-year lease expired in 2021 and they have been on a month-to-month lease ever since. We are sending a letter notifying them of the rent increase. What if anything do you file to document their acceptance of the new rate? Do you include something for them to sign and return, screenshot an email response or is their staying in the unit and paying the new rate responsible acceptance. Thank you.