In the hurry to get things done quickly, buyers' agents often will have clients fill out blank disclaimers and blank lead based paint disclosures for the listing agent to have the sellers sign. For agents who do this: DON'T!!
The law in most states (my guess is all states) is that sellers have to provide buyers signed disclaimers/disclosures. HUD requires the seller/landlord provide a buyer/tenant a completed lead base paint disclosure and if there are know lead hazards, any records or inspection reports.
If buyers do not get the disclosure/disclaimer at contract time they have a 3 day review/recession period on the contract. If they don't' get it at all, they can walk from the contract anytime prior to closing. Why would a buyer's agent want to cut short any recession period that a buyer may have? By completing a disclaimer/disclosure in reverse order, the agents are actually creating a loop hole for anyone to get out of a contract.
As far as the lead based paint disclosures go, always follow HUD's rules and regulations. HUD has severe penalties for mishandling the lead base paint disclosure form. If you have a spare $10,000 go ahead and see what happens by incorrectly following HUD's rules on the disclosure of lead based paint. On second thought, $10,000 might not be near enough.
Also, buyers can't make disclosure for the sellers.