When writing a letter of support for an immigration marriage, some specific topics and details should be avoided, including:   ᐅ Personal opinions or biases: The letter should stick to factual information and avoid personal opinions or biases. ᐅ Personal or intimate details: It's essential to respect the couple's privacy and not include any too personal or confidential details. ᐅ False information: Ensuring that all information in the letter is truthful and accurate is critical. Providing false information could not only harm the couple's application but could also result in legal consequences.