Samantha

Thanks Kiran, you rock! I’d much prefer to use the php snippet.

I basically need to do similar to what this snippet did but on the invoice confirmation:
https://wpgeodirectory.com/support/topic/customizing-confirmation-messages/

I need to replace the _e in this line:

 <div class="wpinv-receipt-message"><?php _e( 'Thank you!', 'invoicing' ); ?></div> 

depending on the CPT. something like:

if CPT = gd_apartments
    return "Thank you! Your apartment will be reviewed and you will receive an email when it's approved. You may now add floorplans to your apartment. Add Floorplans "

if CPT = gd_business
    return "Thank you! Your business will be reviewed and you will receive an email when it's approved."

if CPT = gd_product
   return "Thank you! Your product will be reviewed and you will receive an email when it's approved."

Yes, that works perfectly thank you!

On the functions file I just need to change the wording on the button. It says “Proceed to pay” and I need to change it to just “Proceed”.

We use offline payment so it’s a bit misleading to have it say “proceed to pay” when they’re not actually paying.