Can an NSF fee be refunded?

I'm curious to know, can an NSF fee, which stands for Non-Sufficient Funds fee, be refunded in any circumstances? As someone who deals with financial transactions regularly, I've encountered this fee before and I'm wondering if there's a way to get it back. Is there a specific policy or process that needs to be followed in order to request a refund for an NSF fee? Or is it generally considered non-refundable? I'd appreciate any insight you can provide on this matter.