SRN and HIN are terms typically associated with shares listed on a securities exchange (like the ASX) and held by a broker (like Commsec, Pearler, Stake etc). These numbers are not necessarily applicable to shares issued under a CSF offer.
HIN is a "Holder Identification Number". A HIN is a unique number that is issued by the ASX when you become a client of a broker. A HIN is not applicable for shares issued under a CSF offer, as they are not listed on the ASX or managed by a broker.
SRN is a "Securityholder Reference Number". A SRN is used to identify the owner of issuer sponsored shares that are held by a share registry. For shares issued under a CSF offer, not all share registries operate by issuing a SRN.
To confirm whether or not you have been issued a SRN, you will need to log in to the relevant share registry (see here).
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