Receipt / Invoice after payment

[rwolff]

Hi! How can I send an invoice or receipt (I am not sure which one is applicable in this case) through Square if the customer already paid us via e-transfer?

[Srj]

So they paid you without you putting the transaction through your square as a ticket or sale? You could just put it through as a cash sale and then go to your transaction page, bring it up and issue a new receipt. Or you can just create an invoice and mark it paid. 
If you have already made the sale find it on your transaction page and issue a new receipt. 

[rwolff]

Can you explain how to create an invoice and mark it as paid, please? I created a draft but I could not find the option 'paid'. 

[JustinC]

@rwolff Here's the article found in our Support Center on how to create an invoice. Additionally, this thread explains how to mark an invoice paid.