Contact a calligrapher in your local area. Calligraphers produce handwritten script for wedding invitations or certificates. Explain to the calligrapher that the text will be reproduced into a tattoo, to avoid a copyright issue.
Download a free script font to your computer. Type the word or phrase for the tattoo into a blank page on a word processing program. Enlarge or shrink the script for the tattoo, as well as change the color with the word processing program. Find a backup font, because some fonts may not transfer into a tattoo design.
Ask a tattoo artist to draw the script. Tattoo artists draw for a living and are capable of producing a script, whether the script is cursive or more in depth with detail. The advantage of the tattoo artist drawing the script is the tattoo is drawn specifically for you and at the correct size for tattooing.
Draw the script yourself. Purchase books, such as a book of Celtic font examples, to reference and draw inspiration from. Use a copy machine or scanner to modify the size of the script tattoo after drawing.