What is the likely outcome if a traveler fails to provide necessary documentation for their trip?

When a traveler fails to provide the necessary documentation for their trip, the most likely outcome is that the voucher will be denied or returned. Required documentation is essential for verifying expenses, ensuring compliance with regulations, and validating the reasons for the travel. Without this documentation, there is insufficient evidence to support the expenses claimed, which leads to the denial or return of the voucher. This process serves to uphold accountability and transparency in travel and expense reporting, which are crucial components of fiscal responsibility in any organization.

Other options imply that the traveler can either proceed without the necessary checks or receive accommodations, which would undermine the importance of maintaining proper documentation in travel processes.