When there is a customer who just changed their bank details and requested us to send them a new DD mandate, will this affect the invoice that is set to be collected?

Hello and welcome to the Community, RjamilarinUK

We'll be happy to share some guidance on changing direct debit mandates in QuickBooks.

Any invoice set to be collected will be attempted as usual. To change the DD, you would need to remove the Mandate in QuickBooks by following the steps below. Then, resend the mandate from QuickBooks.

Please note, it can take 2 to 3 days for the bank to process the mandate once your customer accepts the request.

1. Select the Gear icon and under Lists, select All lists.
2. Select Direct Debit Mandates.
3. Find the customer you want to delete the mandate for and select the arrow under the Actions column.
4. Select Cancel mandate.

For further information, check out our guide on setting up DD mandates in QuickBooks. I'm just a post away if you have further questions or require additional assistance.