Correct way of linking arabic numerals and their written-out variants (in official documents)*?

Question

In official documents, numbers are first written in arabic numerals, and then they are immediately written out with words. This is to make certain no fraud can be made. (I assume.) What is the correct way of doing this? The two forms have to be linked with a word, don't they? Example: "$1234... one thousand two hundred thirty four dollars" In place of the dots, should you write "that is,"? (Putting a comma between the arabic numerals and "that", like so: "$1234, that is, one thousand two hundred thirty four dollars".) Should I just put the written-out variant in parenthesis? Example: "$1234 (one thousand two hundred thirty four dollars)" I hope my question is clear. :) *If a separate rule is valid in non-official documents, please be so kind as to explain that as well.

Answer 1

Your assumption for writing out numerals is incorrect. When writing for academia, business or the media--newspapers, magazines, blogs, etc., One to nine are always spelled out: one, two, three, four, and so on. When you are writing numbers greater than nine, the correct way is to use numbers: 10, 11, 12, and so on. If you are writing about money, use the dollar sign plus the number: for example, $2 million, $25 million. Never write out two million dollars. That is reserved for check writing by hand.

In legal contracts, both numbers and writing the words are used: $11,000 is Eleven thousand dollars. If you are signing document, let your attorney handle the way the numbers are presented (assuming you have hired a reputable attorney that concentrates in the field you need.