Will you be kind to tell me if there is such expression:"returning customer"
I would think that this would mostly be used for places that you physically go to, like a restaurant or store. "Repeat customer" is a more common phrase to me, and that would apply to any form of business.
The other night, I was speaking to a retail consultant and he actually used the phrase "returning customer" several times.
"Once you've been in business for over 6 months you need to worry less about retaining your returning customers and more about enticing new customers in."
"Returning customers are your main source of revenue in a shop like that."
Welcome to the forums, ramonal.
Please give your future threads more meaningful titles, such as I know your time is valuable! So is mine! and Returning customer.
Student and Teacher have nothing to do with the questions you went on to ask.