The documents for an international tender required the bidder to supply a brand-new pickup truck with insurance and fuel for twelve months, two workstations and survey equipment. The requirement sat in the additional information section. Outside the terms of reference, outside the price schedule: in a section almost nobody cross-checks against the budget.
Costing that line item came to 16% of the bid amount.
A proposal that reaches the evaluation table without it competes with a number missing one sixth of its value. And the tender package was in order: the requirement was written out in full, in the place nobody looks.
It surfaced because the documents were read from end to end.