Generate and print payment receipts for paid invoices in MYLE Private Billing

Affected users: Clinic administrative staff (MOA) and clinic managers handling private billing, primarily in private clinics.

Task affected: Directly in the MYLE Private Billing module when a patient makes a payment for an issued invoice.

Impact: High impact on clinic efficiency and patient experience. Patients' insurance claims are currently being rejected because invoices are provided instead of proper receipts showing payment confirmation. This forces patients to physically return to the clinic to obtain proof of payment, leading to administrative overhead and wasted time for staff.

Current state: Users can only generate invoices in MYLE. When patients require official proof of payment for insurance reimbursement, staff must rely on manual workarounds outside MYLE to issue receipts.