These days, people start and operate their online businesses from home. It’s quite common for businesses that deal in homemade products, designer clothes, artwork, accessories, etc. These businesses frequently have neither an office nor registration with the government. If that is the case, you have to go for domain validated (DV) SSL certificates only. It would be risky, but it's not illegal (yet) to use DV certs for websites handling users' financial information. But as soon as you register your business, don't forget to switch your SSL certificate from DV to OV.