Fla. Stat. § 718.61

(1) All notices from tenants to a developer shall be deemed given when deposited in the United States mail, addressed to the developer’s address as stated in the notice of conversion, and sent postage prepaid, return receipt requested, or when personally delivered in writing by the tenant to the developer at such address. The date of a notice is the date when it is mailed or personally delivered by the tenant. (2) All notices from developers to tenants shall be deemed given when deposited in the United States mail, addressed to the tenant’s last known residence, which may be the address of the property subject to the rental agreement, and sent by certified or registered mail, postage prepaid. The date of a notice is the date when it is mailed to the tenant.