"pay out" vs "pay off"
In my company we are selling things and expecting to get money from customers by instalments.
English is my second language.
But I often hear things like "pay out payments" and "pay off payments" and they mean different things for native speakers.
I'm not sure but it feels like
A)all the instalment payments are "pay out payments"
B)and the last payment, even if it comes before the due date and cover all current debt named "pay off payment".
The biggest problem is that the vocabularies don't help me. They don't have these phrases.
Now, my questions are
1)Do I understand it correctly?
2)Is there any limits in using these phrases? I mean - I'm in Australia, may it be an Australian lingo? or maybe some special use area, like finance vocabulary? or maybe it was commonly used some time ago and now these phrases are not in a vogue? Please give me some hints of how common these phrases are?
I call them phrases, but maybe they are official phrasal verbs. Are they?