After sending two invoices for payment, I sent another and called the client when the receipt that they had received it came back.
Client: Why are you calling me?
Me: You haven’t paid and this is the third invoice I’ve sent.
Client: It’s even more than the last one!
Me: Yes. The contract you signed stated that I would add a late fee for payment.
Client: You mean I have to actually pay you? I thought you were joking!
Me: What on earth made you think that?
Client: You’re a freelancer!
Client: Well, you work for free! If you were supposed to be paid, you’d be called a paidlancer or something!