I recently acquired a Touch Smartcard now that (some) journeys and tickets on my regular trips are covered. However I have a couple of questions
I experimented with two one-stop journeys, on different days, from one unstaffed station to another (the latter only has a validator at one exit, so passengers leaving the station on the other side wouldn't go anywhere near it).
I'd purchased the correct tickets for the journeys I made and had activated them via the TOC's app to my Smartcard using the NFC functionality.
The guard did not check my tickets on either journey.
Journey 1 - day return ticket
I didn't bother touching the validators at either end. This ticket has Validity Code 25.
Journey 2 - anytime single ticket
I touched the validator at the departure station, but didn't touch the validator at the arrival station. This ticket has Validity Code 17.
A Google search for Validity Codes unearthed this list, which may be up to date(?):-
www.railwaycodes.org.uk
According to that site, the above Validity Codes mean the following:
I get the meaning of the first one, but would it cause an issue if my ticket had been for a journey to a gated station? After all, the gates at the destination station would surely assume my my journey couldn't possibly be "unstarted" if I was using a paper or e-ticket.
The second I find baffling, of course the ticket wasn't issued from the TVM that also has the validator, as it had been purchased and activated using the TOC's app. Is this an issue? and, if so, why?
Many thanks in advance if people who understand this stuff can provide some guidance.
I experimented with two one-stop journeys, on different days, from one unstaffed station to another (the latter only has a validator at one exit, so passengers leaving the station on the other side wouldn't go anywhere near it).
I'd purchased the correct tickets for the journeys I made and had activated them via the TOC's app to my Smartcard using the NFC functionality.
The guard did not check my tickets on either journey.
Journey 1 - day return ticket
I didn't bother touching the validators at either end. This ticket has Validity Code 25.
Journey 2 - anytime single ticket
I touched the validator at the departure station, but didn't touch the validator at the arrival station. This ticket has Validity Code 17.
A Google search for Validity Codes unearthed this list, which may be up to date(?):-
Railway station barrier error codes
A list of UK railway station ticket barrier error codes

According to that site, the above Validity Codes mean the following:
25 | NOT ENTERD | Unstarted journey - exit not permitted |
17 | NOT ISS HR | Not issued here (attempting entry with a ticket issued elsewhere) |
I get the meaning of the first one, but would it cause an issue if my ticket had been for a journey to a gated station? After all, the gates at the destination station would surely assume my my journey couldn't possibly be "unstarted" if I was using a paper or e-ticket.
The second I find baffling, of course the ticket wasn't issued from the TVM that also has the validator, as it had been purchased and activated using the TOC's app. Is this an issue? and, if so, why?
Many thanks in advance if people who understand this stuff can provide some guidance.