Why avoid the word please in error messages? [duplicate]

1. Should you say please in error messages?
2. Which is not recommended for error messaging in application?
3. What are the three causes of error messaging?
4. What is the best error message?

Should you say please in error messages?

Use “please” only rarely, if ever. Sometimes lengthy instructions or error messages might need a touch of politeness added to one of several sentences, but generally, do not use “please” in English. If you still feel the need, at least avoid using “please” more than once in one text or group of sentences.

Which is not recommended for error messaging in application?

Don't blame the user

Users are already going to be frustrated when they get an error message—don't make it worse by placing the blame on them. This means you should avoid using phrases like “you did” or “you didn't” when explaining what went wrong.

What are the three causes of error messaging?

The three main factors that influence the design of error messages are technical limitations, the amount of information to be presented, and what kind of user input is required.

What is the best error message?

A good error message has three parts: problem identification, cause details if helpful, and a solution if possible. Whenever an error occurs, user wants to fix it as soon as possible. The error message should have enough information for user that guides him how to get out of the erroneous situation.