People could send a text message with the code and get a message back confirming that what they bought is listed in a database.

VOA: special.2010.03.01

Select Comfort bought ads in local newspapers, which instructed users to send the company an SMS message with their zip code.

FORBES: CMO Network

If you have tax to pay it is too late for it to be collected through your PAYE code and you will need to send a cheque with your form.

BBC: The tax deadline at the end of January