Last week courier company PBT came under fire after one of its drivers left a sign-for package with a gun in it outside someone's house. Another incident has been revealed and has brought to light the standards in which courier drivers must work, forcing them to leave packages unsigned for.

Most courier drivers are owner-operators and, therefore, work at a rate determined by the company for which they work, which is per delivery. A driver's pay is impacted if they do not deliver a package.