Update Invoice | propelone

This endpoint expects a multipart form.

due_datestringRequired

Optional: Invoice due date - date format - “2026-04-30”

invoice_datestringRequired

Optional: Invoice date - date format - “2026-03-05”

payment_termsstringRequired

Optional: Payment terms - string - “net_45”

customer_notesstringRequired

Optional: Notes visible to customer - string - “Updated notes”

internal_notesstringRequired

Optional: Internal notes - string - “Updated internal notes”

customer_signed_atstringRequired

Optional: Date/time customer signed - datetime - “2026-03-16T10:00:00Z”

customer_signature_receivedstringRequired

Optional: Whether signature has been received - boolean

customer_signature_requiredstringRequired

Optional: Whether customer signature is required - boolean

Successful response

1	curl -X PUT https://https//https/billing/invoices/%7Binvoice_id%7D \
2	-H "{{tenant_key_name}}: {{tenant_key_value1}}\|{{tenant_key_value2}}" \
3	-H "Content-Type: multipart/form-data" \
4	-F due_date="2026-04-30" \
5	-F invoice_date="2026-03-05" \
6	-F payment_terms="net_45" \
7	-F customer_notes="Please review the updated invoice details." \
8	-F internal_notes="Invoice updated to reflect new payment terms." \
9	-F customer_signed_at="2026-03-16T10:00:00Z" \
10	-F customer_signature_received="true" \
11	-F customer_signature_required="true"