Need 4x6 paper with blank rear side

I need to buy some 4x6 photo paper for printing gift certificates at work but I need it to not say the brand of the paper on the rear. Right now we're using Canon Pro Platinum (here) but it says "Canon" on the back.

Can anyone recommend something of similar quality (as in, you can stick it in the sink under running water and nothing happens) that has a blank rear side?

Glossy/resin-coated photo papers often has company name on the back of it; however, most matte paper has nothing written on the back side.

I don't have any in front of me right now, but my recolection is that Staples brand dosen't have anything on the back. Even the glossy. Should be fine for gift certificates.

I'm pretty sure the Kirkland paper from Costco has nothing on the back.

Red River papers doesnt have anything on the back

Ok, thanks, I'll check all those out.