Polite 14-days-overdue B2B invoice nudge

A B2B invoice is 14 days overdue. The client's a long-term one I want to keep, so I need a polite but clearly-not-the-first-nudge tone.

Practice: {{practice_name}}
Client + AP contact: {{client_ap_contact}}
Invoice ref + amount: {{invoice_ref}} — {{amount}}
Original due date + days overdue: {{due_date}} ({{days_overdue}} days)
Whether I've chased already + how: {{prior_chases}}
Anything I know about why (period close, AP turnover): {{context}}
PO number / matching reference if known: {{po_number}}
Where they should remit + by when I'd like it: {{remittance_ask}}

Write a 140–170 word email.
- Subject: "{{invoice_ref}} — payment status?"
- Open: name the invoice, PO, amount, original due date in 1 short paragraph.
- One line: acknowledge any prior chases without overstating them.
- "Could you confirm" — labelled mini-block with 2 questions: (1) is this with AP / scheduled? (2) is there anything blocking it?
- Remittance details echoed in one line.
- Close: "If it's easier to talk, my number's below — happy to clear anything up."
- Sign-off as {{your_name}}, with role + phone.

AU English. Professional, neutral, no edge. No "just following up" — say what the status check actually is.