Don't you believe it.
In the multinational company I work for, a supplier put us on hold and would not deliver anything until we paid a late invoice.
I got all the files together and took them down to finance. I put on my best begging voice and asked her to make an immediate payment.
She said "no problem, I'll get it on Wednesday".
I said "But it's urgent, I need an immediate payment'
And she said "Yeah, we do all our immediate payments on a Wednesday" !!!