Under the legislation, all tenants named on assured or assured shorthold tenancy agreements created before 1 May 2026 must be provided with the government issued document.
The professional body warned that agents who fail to comply could face financial penalties of up to £7,000.
Propertymark also highlighted that providing tenants with a link to the document online does not meet the legal requirements. Instead, the information sheet must be supplied either as a printed copy or as an electronic attachment, such as a PDF sent by email.
The reminder comes as the private rented sector continues to adapt to the first phase of the Renters' Rights Act, which came into force on 1 May 2026.
The reforms introduced a range of changes to the rental market, including the abolition of fixed term assured shorthold tenancies and amendments to rent increase procedures.
Propertymark is urging agents to review tenancy records and ensure all affected tenants have received the required documentation before the deadline expires.
Nathan Emerson, chief executive of Propertymark, said: "With the deadline fast approaching, agents should already be reviewing tenancy records and confirming that every named tenant has received the correct documentation in a compliant format.
"Some agents may assume sending a website link is enough; however, the legislation clearly requires the information sheet to be supplied directly, either in print or as an electronic attachment.
"Taking action now will help agents avoid unnecessary penalties and demonstrate a professional approach to supporting tenants through these significant legislative changes."
