The letter of representation is considered reliable audit evidence because:-
It provides written confirmation of managements representation. It therefore has more credibility than oral evidence especially in instances where the management representations in the letter appear reasonable and consistent with other sources of audit evidence.
The reliability if the evidence will also depend on whether the individuals making the representations can be expected to be informed on the matter.
If the letter of representation is contradicted by other evidence, the auditor should investigate the circumstances and where necessary, reconsider the reliability of other representations made by management.
The Company‘s Act make it an offense to give the auditor false information thus the management is bound to provide the auditor with information that is true.