Was initially going to put this is freebies - but then saw that you have to pay P&P (please move if its in the wrong section).
Argos have launched their new website for prints and photo gifts called Argos Photo. To celebrate they are giving you 100 free 6x4" prints, a free photobook and a free £10 voucher to spend on their new website. However you do have to pay postage and packaging.
To get this offer, all you have to do is register with them (takes less than a minute) and they email you the free codes. They also have an option when you're registering to opt out of their emails.
Postage and packaging charges are as follows:
Free 100 prints - P&P £1.99
Free Photobook - P&P £3.99
Gift bought using free £10 voucher - P&P £1.95-£2.99 depending on gift chosen.
email with offer codes say expires 11 May