Is the sctk.au link legitimate?
Yes - https://sctk.au is the secure short domain of Scantek, easyAML's identity verification partner.
Yes. If you've been sent a link to verify your identity and want to check that https://sctk.au is legitimate: it is the official short domain owned and operated by Scantek Solutions Pty Ltd, easyAML's identity verification partner. The short URL is used so verification links fit into text messages - the longer part of the message is a share code unique to your verification.
You can verify this yourself with a whois lookup, which shows the domain belongs to: Registrant: Scantek Solutions Pty Ltd, ABN 26 158 339 514.
All verification domains use secure HTTPS connections and follow industry best security practices, and Scantek is ISO 27001 Information Security certified. Thank you for being vigilant about your online safety - checking a link before submitting identity documents is exactly the right instinct.