about legal business

[shopshop444]

is making paid-tip site legally ? about the ssl certifate? do i need to register a company for this?

[iastaff]

is making paid-tip site legally ? about the ssl certifate? do i need to register a company for this?

This would depend on where you host the site (country). Regarding ssl certificates, you can buy your own, use the ones on shared hosting servers, or go without one. Regarding registering a company, this is up to you.