SAP just sent me a SAP Ariba Certificate Renewal from SAP CloudSupport Alerts <sapcloudsupport@alerts.ondemand.com>

First, that looks like a scam email. Putting sap in the username and not having sap in the domain name is just the kind of thing you see in scam email.

Second, I have no idea why they are sending this to me. I did sign up to use their website to send invoices to a company, but I don't think that would require a certificate.

There's a big company I want to do business with that uses SAP. You can sign up to the website for free to send invoices and such, but if you want additional features you can upgrade for free, but the catch is if your business grows to a certain point, then you have agreed to give them a percentage. Feels scammy to me.