Endorsers should also take due care to ensure that an advert "does not convey ... express or implied representations that would be false, misleading or deceptive if made by the trader or manufacturer or advertiser of the relevant product or service."
If an endorsement of a product or service is made through a testimonial, the guidelines propose that such endorsement should reflect the genuine, reasonably current opinion of the endorser, and should be based on either adequate information about or experience with the product or service being endorsed.