[amerkhalid]

Not sure where you are but in the US, you don’t need any business license for many types of businesses especially when freelancing. And you can invoice using any method including handwritten.

It is probably smarter to do something better than handwritten invoice but I am glad there are not so many hurdles to starting a business here. I have dealt with a lot of contractors here who don’t even issue a paper invoice for small jobs, they just tell me how much I owe and I just pay.

Small jobs probably are not worth suing for. But I’m sure if I don’t pay for a big enough job, they would sue me.

[nivertech]

the context was tech companies and startups

you need to save a paper or electronic trail, every email or instant message should be treated as a future evidence in court

while technically US citizens don't need a business license to be self-employed, federal or local state agencies may still charge you, as some people were forced to pay for a business license just b/c they were running blogs with ads, and received some pennies in ads revenue