A text message can be used as evidence to prove some type of misconduct. Whether your message to your daughter will prove that you committed fraud depends on specifically what was said, (although I wouldn't reveal it on the web if you have concerns). Good luck.
Yes, however, the text message may be explained or taken out of context. So, it remains to be seen on whether the message standing alone is proof of wrong doing. Good Luck!
Evidence can come from any representation proven to be attributable to you. Whether the evidence is competent or "admissible" is another question all together. While a text message in one context may be "admissible" in one case it may not be in another, e.g., if the person charged with sending the text message had their phone stolen they may be able to succesfully argue that the text message did not come from them.