Most airlines now require passengers to present photo identification before boarding a plane. Since tickets generally are non-transferrable, if your ID does not match the name on the ticket, the airline is likely to confiscate the ticket. If you are considering purchasing an airline ticket from someone who has decided not to use the ticket, you should call the airline and check whether it allows tickets to be transferred. In addition, if you do not purchase your tickets directly from the airline, you should be sure the person selling you the ticket is an authorized agent of the airline. Ask if the person you are dealing with is a member of the American Society of Travel Agents or certified member of a similar recognized agency.
Many travel agents have their memberships affiliations clearly posted where they do business.