Self-writing will is a special form of will. The second paragraph of Article 17 of People's Republic of China (PRC) Inheritance Law stipulates: "A self-written will is written by the testator, signed and marked with the year, month and day." According to this regulation, the requirements for writing a will are:

(1) The contents of the will must be written and signed by the testator;

(2) The testator must personally write the full text of the will with a pen;

(3) The year, month and day must be indicated, and all three items are indispensable. You don't need a witness to write your own will. However, the validity of printing a will and then just signing it, indicating the year, month and date, is controversial, depending on the specific situation. If there is evidence to the contrary that the printed will is not what I really mean, it is likely to be considered invalid. If there are several wills, the notarized will is the most effective; If there are several notarized wills, the one with the last date is the most effective. It's best to write it yourself, with personal handwriting as evidence.

The above is the content of inheritance law, and the corresponding explanation is supplemented. To answer your question:

1, since the book meeting, you don't need others to witness it, write it yourself.

2, only need to sign, do not need to stamp. It doesn't matter if you put more personal stamps on it.

3. Handwriting, with signature and date.

Your question didn't say whether you wrote the date. If it is written, it is a valid will.