Can we wrte thankingyou in anticiapation in mail

What a great question!

Yes, you can definitely write "Thank you in advance" in an email or letter. This phrase is a common way to express gratitude before someone has even done something for you. It's a polite way to acknowledge that you're expecting something from them and that you appreciate their effort.

Here are a few examples of how you can use this phrase:

Using "Thank you in advance" can help set a positive tone and show that you value the person's time and effort. It's a considerate way to express your gratitude, even before the person has done anything for you.

Just remember to be sincere and genuine in your expression of gratitude. The person receiving your email or letter should feel appreciated and valued, not just acknowledged.