<prompt> Translate the following text to SwahiliFor example, such approvals could be evidenced by purchase orders signed by an authorized official or travel orders and vouchers signed by supervisors.  <response>: Kwa mfano, idhini hizo zinaweza kuthibitishwa na maagizo ya ununuzi yaliyotiwa sahihi na ofisa aliyeidhinishwa au maagizo ya kusafiri na voucher zilizotiwa sahihi na wasimamizi. 