An example of writing an announcement especially for people who often lose things.
Always use formal language, don’t forget to mark where you have last seen your lost thing (a cell phone is given in the example) and why it is so important to get back (a man is going crazy without a cell phone in the example).
I have lost my cell phone again. If you have found it, please bring it to the school’s principal and get the reward (a candy).
The last time I still have had my cell phone was three weeks ago at the museum all twelve grade pupils had to visit.
It is very important for me to get my cell phone back because I am addicted to text-messaging and I can feel that I am already going crazy without this activity. I can not answer for my future action any more.
Thank you in advance.