Staples, W.B. Mason and Amazon sell blank gift certificates. The forms are manufactured by Adams and Rediform and are typically available in packs of 25.
Staples and W.B. Mason offer Adams two-part, carbonless gift certificates with envelopes. The forms measure 8 inches by 3 2/5 inches. They are numbered sequentially and are available in a multi-color design. A majority of Staples customers give this product high marks citing ease of use and convenient carbon copy feature.
Amazon offers Rediform's two-part, carbonless variety, with blue printing on a yellow and gold background and blue border. Rediform's certificates are also available with envelopes. Most Amazon users recommend these certificates, citing value.