This method is 100% safe as long as you are not using for bulk messages

Pros of Unofficial APIs
* You bypass Meta’s per-message pricing entirely. Whether you are sending a transactional receipt or a promotional blast, there are zero official WhatsApp fees.
* No Approvals or Templates: You do not need to submit message templates to Meta for approval. You can send any content, at any time, without waiting for the official green light.
* No 24-Hour Service Window: Unlike the official API, which restricts free-form replies to a 24-hour window after a customer messages you, unofficial APIs allow you to initiate or reply to conversations whenever you want.
* Simultaneous Mobile App Use: Because these tools typically work by mimicking a "Linked Device" (WhatsApp Web), you can keep your primary phone number active on your physical smartphone while still automating messages through the API.
* Access to Native Features: Unofficial APIs often support features that the official Cloud API restricts, such as creating and managing WhatsApp Groups, updating Statuses, and interacting with Communities.
* Instant Setup: There is no lengthy Meta Business verification process. You can generate a QR code, scan it, and start testing your API integration in minutes.

Cons of Unofficial APIs
* High Risk of Permanent Bans: This is the biggest drawback. Unofficial APIs strictly violate Meta’s Terms of Service. If WhatsApp's automated systems detect bot-like behavior, non-human typing speeds, or spam patterns, your phone number can be permanently banned without warning.
* Zero Official Support: If your number gets banned or a message fails to deliver, you have no recourse or customer support from Meta.
* No Official "Green Tick": You cannot apply for the verified Official Business Account badge (the green checkmark), which can lower trust for customers interacting with your brand.

I am attaching the zip file here.
Install it in the latest version of FA.

1. Create Invoice.
2. Add Chat Id in the customer setup. It can be number with country code without + Or the Customers Group Id.
3. Open Customer INquiry page
4. Send WhatsApp.
5. It will check for company email (if not defined) for creating session
6. It will ask for scanning like whatsapp web
7. Now you can send invoice, payments, delivery notes

Let me know your feedback.