How to send tax invoice after shipment has been delivered

[CoolJay]

Hello all,

Our stores are located in Malaysia & US and I know that Shopify Shipping carriers (Fedex, Canada Post, DHL, UPS, or USPS) are used internally when orders are delivered. Customers are able to receive the "Out for delivery" & "Delivered" shipping emails if one of these carriers is being used.  We're using Ava PDF Invoice: Order Printer app to include a clickable print tax invoice link/button in shopify native" Out for delivery" & "Delivered" shipping email notification for our US store.

The problem we're facing is that we are not using Fedex, Canada Post, DHL, UPS, or USPS in Malaysia. We're using Ninjavan, or Lalamove etc etc as our shipping courier. Shopify would not send the Out for delivery" & "Delivered" shipping email notification... and we really need to include the tax invoice into our "delivered" email when customers receive their parcel..

I'm really stuck in this.. how does merchant go about this to include a printable/pdf tax invoice when orders are delivered?

We're using Rush - Order Tracking & Lookup for our shipment & order tracking.. however we cant include the printable tax invoice in as Ava PDF app does not integrate with them

Any suggestion please?