@Vicky Covarrubias , "Yellow Letters are yellow tablet paper digitally handwritten letters inserted into an invitation style envelope which is addressed by hand." - yellowletters.com

Tablet paper isn't printed and bound evenly so when you tear out the sheets the lines aren't lined up the same.You'll find that more expensive brands are better and the other solution is to create a lined document and print on blank paper two sided.And mailing words over lines is much better than not mailing.

And I ordered these: TOPS Docket Gold Writing Tablet, 8-1/2 x 11-3/4 Inches - Smooth, premium weight 20 lb. bond paper. 

All this is downloadable and can be put on any laptop, tablet or smartphone.

A lot of printers do not like the weight of the tablet paper and jamb a ton...

Makes folding into invitation envelopes a lot easier..I can send anyone the file to take to their printer and have 20 pound paper printer to appear like yellow tablet paper... and then you can then print the actual letter usining your printer...

I would suggest buying above grade yellow tablets as the lines are more consistant and the paper feed through the printer better.Good luck... and if I can answer any questions as you work through this let me know.

Of course you realize this is an excellent reason to go buy an iPad or some other tablet.

Tossing a few pan tablets in the drip pan every spring can save a landlord from many headaches.

Although you can buy the calculator, there are several great apps for about $5.00 for iPhone and Android phone and tablets.