If it is a new place I’m going I normally ask for payment same day
A new place where I have started are orgaorganised and laid out all the facts and said payments are made on this particular day of the month and have entered been let down
I have regular locum days and get paid end of the month..
If 2 or 3 days pass and I haven’t been paid then I start making a fuss I.e political reminders and fortunately it sorted
Only once I had to chase payment system for 3 months or so for an independent (R and J optical for your information)
They were messing plenty of locums about
I rang the practice every day till they got fed up I guess and paid me