The scheme, launched in conjunction with The Gift Voucher Shop, will see the Post Office sell vouchers ranging from £10 to £100. They will be available in all 14,600 branches, as well as by phone and online, and can be redeemed at high-street stores such as Top Shop, Woolworths and Comet.
Press, radio and outdoor ads created by Publicis will back the scheme from next month, supported by an in-store programme developed by Toast.
All media is being handled by Carat.
The Post Office will also sell two specialist ranges of vouchers. 'Experience' vouchers will be redeemable with Virgin Experience and Buyagift.com, while 'enjoyment' vouchers will be offered in association with independent providers such as Vinopolis and Blackpool Pleasure Beach.