Is this email really from SignKaro?

Paste the link from the email. Do not open it first.

Or check these four things yourself

1. The link starts with https://signkaro.org/s/. Nothing else. Not a look-alike such as signkaro-docs.com.
2. The email comes from no-reply@signkaro.org, and the sender name ends with "via SignKaro".
3. SignKaro never attaches a document to an invitation, and never asks for a password, bank details, or a payment.
4. The email names the person who sent it. If you did not expect a document from them, ask them directly, by phone or a message you started.

Check a signed PDF

Pick a signed PDF from SignKaro. Your browser calculates its fingerprint (SHA-256). Only the fingerprint goes to SignKaro, never the file.

The SignKaro seal

SignKaro seals each signed PDF with a digital seal and a trusted timestamp. A PDF reader shows the seal as broken if anyone changes the file. Adobe Reader can say that it does not know the signer, because the seal certificate is SignKaro's own. To confirm it, compare the certificate fingerprint in the PDF's signature panel with this one:

SHA-256 FF:9A:16:F4:70:17:2E:5F:6B:9C:C3:1B:E0:EB:2C:0A:03:E0:B2:82:EA:D9:81:46:5C:A2:80:74:0B:30:45:46

Download the seal certificate. In Adobe Reader you can add it as a trusted certificate. The seal protects the file. Each signature stays a simple electronic signature.

Got a suspicious email? Do not open the link. Forward it to abuse@signkaro.org.