Setting to Change Default Certificate File Names

Hello,
Could I please suggest coming up with a setting to change what a statement of attainment is called when being saved as a zip archive or when being attached to an email.

Currently, the certificate name is automatically defaulting to the qualification the unit is from eg. cert III heath. In our situation this is not correct because the individual has only completed one or a few units of competency not whole certificate.
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Really time consuming having to save pdf copies down and renaming one by one. Hopefully there is a better solution....

Appreciate your time,

Sam