[Tagging] Vending: Cards for Prepaid mobile phone

[Andreas Goss]

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in a retail store by purchasing a "top-up" or "refill" card at retail. 
These cards are stamped with a unique code (often under a scratch-off 
panel) which must be entered into the phone in order to add the credit 
onto the balance.
https://en.wikipedia.org/wiki/Prepaid_mobile_phone#Overview_of_the_prepaid_service
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How would you tag this?

mobile_top-up_card or mobile_top-up_voucher would be the first thing 
that comes to my mind if we want BE, at least that what I found at UK 
providers.

Although something like mobile_refill_card or mobile_prepaid_card (or 
then rather voucher so there is no confusion with a prepaid sim card)

 >

Oh and is vendin=telephone_vouchers a good tag for a 
https://en.wikipedia.org/wiki/Telephone_card? Looks like nobody calls 
them like that. Btw. is it really telephone card or phonecard and not 
phone card? We probably have to doulecheck that anyway, because I bet 
many are for mobiles as there was no documentation.

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