I've been asked to train "customer service" in a local charity group. I've never met the trainees, and I only know one or two people there.
One of the procedure includes small details that I feel will help them to increase "customer" satisfaction. They are similar to "wrap the money around the receipt to ensure you won't forget to give the receipt to the customer", it is actually alright not doing them, but doing them will help the workflow and increase customer satisfaction.
Due to this being a charity group, many (if not most) of them will be volunteers. Their coordinator will introduce me as their trainer, but I don't know her, so I hope I can refrain from asking for her help on this. Since they are volunteers, I'm reluctant to suggest giving punishment (for instance, banning them from volunteering next event).
I'm expecting they will say "okay", but not actually doing them (the small details) when doing their job. The result of this training will affect my reputation as a trainer. So,
How do I communicate to the trainees to ensure they will do the small details to the best of their ability?
One of my concerns is that continuous reminding of the small details will make them upset and be seen as nagging.
The training will be conducted every several months as new volunteers come in. Volunteers are not obliged to help through every event. Not doing the aforementioned small details does not directly affect anyone, but makes them prone to mistakes, for example forget to give a receipt.