AES : eIDAS Art. 26
The signature trial
Sign a document. Then verify the seal yourself.
In about a minute you will sign a sample lease, watch a real cryptographic seal close over it, and then check that seal offline. No account, and this trial keeps nothing of yours : it runs zero custody over a sample document, so only a fingerprint is stored. A genuine Ed25519 signature at the end.
Enter an address and your one-time signing code is sent there, the way a real signer receives it. Leave it blank and the code is shown on screen instead. It is used for this code and nothing else.
This is exactly what your customers would experience under your brand.