Shopify registration requires you giving them your social security number[1], DOB besides the regular basic PII for tax purposes. Since Sello is a service by Shopify, it&#x27;s very likely Sello would required the same (haven&#x27;t tried it yet).<p>Good luck giving out your most private PII in exchange to sell just a few things online (it makes much more sense if this is your full time job.) For others, Craigslist&#x2F;eBay&#x2F;Etsy etc. are probably better off.<p>PS: these 3rd party e-commerce platform are increasingly becoming the main targets for data breaches from cyber criminals.<p>[1]: <a href="https:&#x2F;&#x2F;www.shopify.com&#x2F;legal&#x2F;terms-payments-us" rel="nofollow">https:&#x2F;&#x2F;www.shopify.com&#x2F;legal&#x2F;terms-payments-us</a>