Email Problem and Changing Invoice

[Tut]

Changing the title was discussed in this thread at post #55:

[16.11.1] Added new themes for invoices, quotes, orders, receipts etc

You can’t make theme specifically for invoices. Themes are always universal (this is on purpose). But that shouldn’t be an issue. In theme, where {{ title }} variable is used, simply replace that with: {{ title | replace: "Invoice", "Tax Invoice" }} This will apply replace filter to title variable so if it contains Invoice, it will be replaced with Tax Invoice.

You just have to change the wording.

However, an invoice is an accounting document with specific legal meaning. A receipt is something different. The invoice is a demand for payment. A receipt says the customer has already paid. If you are receiving payment at the time of delivery, you are not selling on credit and probably should not be using sales invoices. Use cash receipts instead. See the Guide:

Make cash sales (sell without sales invoices)

A cash sale occurs when a customer pays for goods or services immediately upon delivery. No credit is extended by the seller. No account receivable is created. Resulting revenue is posted immediately to an income account, regardless of whether the business uses accrual or cash basis accounting. Therefore, no sales invoice is required. The entire transaction occurs in a single step. Note A cash sale does not need to involve receipt of physical cash. Money can be received via any form of exchan…