Final answer:
To prepare an invoice for a window envelope, fold it in thirds (Z-fold or tri-fold) so that the address on the invoice aligns with the window and is visible when it's mailed.
Step-by-step explanation:
If you need to place an invoice in a window envelope, the appropriate way to fold the invoice is usually in thirds. This is commonly referred to as a Z-fold or tri-fold. This method will ensure that the address on the invoice is visible through the envelope's window when it's mailed.
The folding process is as follows:
- Lay the invoice face up in front of you with the address near the bottom.
- Fold the bottom third of the invoice up so that it's just behind the top edge of the window when the envelope is held up to the light.
- Then, fold the top third down so that it covers the already folded bottom portion.
Ensure that the invoice fits neatly within the envelope, and double-check that the recipient's address is properly aligned with the window.