A Simple Electronic Signature is any electronic mark showing intent, a typed name, a drawn squiggle, an uploaded image of a signature, a ticked box. Under eIDAS it's a real category and it can be legally valid.
swipesign doesn't offer it. It's legal enough. It just doesn't do the job most people assume it's doing.
What you don't get
- A verified identity. Nothing establishes that whoever typed the name is the person named. Anyone with the link can produce the same mark.
- Tamper evidence. The document isn't sealed, so if it changes afterwards, nothing shows it.
- Anything a third party can check. There's no certificate to validate and no independent trail.
So you get a signature that looks convincing and proves very little. That's fine until somebody contests it, which is the one moment you needed it to work.
Where we start instead
Every swipesign signature is at least an Advanced Electronic Signature: sealed so later edits show up, and tied to the signer through their email address and a phone number rather than to nobody in particular. Qualified signatures go considerably further, with an identity check by a qualified provider.
This does mean swipesign is the wrong tool if what you want is a one-click typed name with no identity step. It's the right tool if you want the signature to survive being questioned.