Hi @marshallbigstak
Looking back over your previous threads, you are probably wanting to top up your mobile broadband data dongle.
Unless the voucher is intended for a mobile phone with a Big Value Bundle which would expire after 30 days, top up vouchers themselves don't expire and you should be able to keep the voucher until you are ready to use it. If you have a voucher to top up your data dongle, it won't do any harm activating the voucher and keeping the data pack queued ready to be used when your present data allowance has been used.
There is further information for you below.
How do I buy a data pack?
