Launching Stampivity tomorrow — how do you stamp your invoices today?

Hi everyone — I'm Zohaib, a solo maker. Tomorrow I'm launching Stampivity here on Product Hunt: custom digital stamps for invoices and business documents, designed by hand, delivered within 24 hours, $4.99 one-time.

A genuine question for freelancers and small business owners: how do you handle APPROVED / PAID stamps on your paperwork right now? Print, sign and scan? A free online generator? Or no stamps at all?

Your answers honestly shape what I build next. The launch goes live tomorrow at 12:01 AM PT — follow the product page if you'd like a ping when it's up.