Subject: Payment reminder — invoice INV-104 Hi Taylor, I’m following up on invoice INV-104 for USD 1,200, which was due on 15 September. Our records currently show USD 600 outstanding. Could you confirm the expected payment date? If payment has already been sent, please share its date and reference so we can match it to the invoice. I’ve included a copy of the invoice for reference. Please let me know if anything needs clarification. Thank you, Alex