What is a PMT dishonored fee?

Excuse me, could you kindly explain to me what a PMT dishonored fee is? I've come across this term in my recent financial transactions and it seems to be related to payments or transfers. I'm curious to know if this fee is imposed by the bank or a third-party service provider, and what specific circumstances would trigger such a fee. Is it something that can be avoided or is it a standard charge for certain types of transactions? Your clarification would be greatly appreciated.