We are 95% domestic,
This happens a couple of times a year, as dazmond says, Christmas is the other time.
I stopped collecting years ago; it was the best move I made. It was hard to start with but once your cash flow is used to the amount outstanding you should not even notice it until times like this.
I made the mistake of going out to collect a few who were late once, they paid no problem but then expected me to do it again so I soon stopped that.
As my business has grown so has the amount outstanding but I don’t worry as it’s all relative, as long as I keep an eye out for persistent non payers it works fine. No one ever goes more than 3 cleans. (well the odd one occasionally slips through the net)
My time is better spent doing other things, (or relaxing). I don’t like spending hours of unproductive time collecting.