Writing a name with a red pen means it is unknown, because the name written with a red pen generally only appears on the tombstone. There are the following situations to write a name with a red pen:

1, names written in red pen will only appear on tombstones, so it is not appropriate to write the names of living people in red pen, and many people will be taboo.

2. There is a folk saying that "Dan Shu is unknown". It is said that Ye Yan's book of life and death is circled with a red pen. Therefore, it is said among the people that writing with a red pen is a curse and a great disrespect to people.

3. In the past, the emperor used a red pen to approve the memorial, which was called "Zhu Pi". Only the emperor has the right, and others are not allowed to use red pens.

Font color taboo

1, when writing other people's names, it is forbidden to use red and white, especially when signing in for activities, use gold, silver or black.

2. The words should be written in black to show respect or attention, and other bright colors are not allowed.

3. Other official documents and folders can be black.