On 28 Feb, 11:27, "MIG" wrote:
In my case, given that my card was refused by the reader on a bus (I
travelled anyway) after I had passed the capping limit, I want to find
out if it is safe to put any more credit on the card or whether it
will be gobbled up by a penalty £4 fare due to there having been a
problem (whoever's fault the problem was).


Why not have a look using one of the machines at a Tube station? If
you've got £-4 on the card, it will tell you.

NB you shouldn't have a penalty: if the light doesn't turn green, the
system hasn't touched you in or out and therefore doesn't penalise
you. Sounds more like a faulty reader on the bus...

--
John Band
john at johnband dot org
www.johnband.org