unfortunately, I don't know of a way to send all the transactions at once. you would have to click on each one and resend it.
There are two ways to do this. I have actually had to do the same thing. Each receipht has a unique number assigned to it. The easiest way to do this is first right down every receipt number associated with the client. Next build an invoice with generic items that include the date of the transaction and the Receipt # associated with the purchase. Tell the client if he wants the detailed information then you can send him a copy of each receipt manually attached to a printed copy of the invoice.
If the client insists on a detailed receipt on one ticket than you can do this but it is much more time consuming. You will have to ring everything into your register and will need a printer and save the receipt without tendering it. The open the receipt and print it like a server would do in a restaurant. Once you have the copy you can then delete the transaction as it never was tendored.
Hope this helps.
Wondering if there is an update to this? I have a client that would like a total bill for 2021. All I see is individual transactions, or the summary of what she spent since her time with me.
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