How do you currently follow up on unpaid invoices?

Hey PH community,

Building a tool for freelancers around invoice follow-up

and doing some research.

Quick question: when a client doesn't pay on time, what

do you actually do?

a) Send one reminder and wait

b) Follow up multiple times manually

c) Use a tool that automates it

d) Mostly just let it go and hope

Genuinely curious how people handle this it seems like

one of those problems everyone has but nobody talks about.

(For context: I built Nudge nudgehq.xyz after realizing

most freelancers send one reminder and give up, leaving

thousands unpaid every year)