Thank you. However, we did not change the threshold of our account. In May, there are two invoice received, one issued on 1 May and another on 31 May. Then we received the next invoice dated 30 Jun. It seems that the invoice date is moved to end of the month. Can we request to change this invoice date back to first date of next month? Thank you.
I would advise you reach out to our support team (ways you can reach them are here: https://support.google.com/adwords/answer/8206?hl=en) if you're wanting to make payments to your invoicing. They can also take a look at the invoices you're referencing and shed light on why the delivery date was different.