Is there a special format for reports or complaints?

No, but you should include all of the following information with your complaint:

Name, address, and telephone.
Your relationship to the resident in the nursing home.
The resident’s full name and reason that he/she is in the home.
Times and dates that you observed the problems.
Names of staff who may be involved, including those that you have spoken to about your concerns.
Any medical records relating to the abuse or an autopsy if death occurred.