Today, I sold a puppy to lady and she asked if we could take a check. I told her we could as long as we got her license number. She wrote down her license number on the check and I verified to make sure it matched. She took the puppy and later my family asked why I took a check. I told them I took it because I got her license number and we can dispute if she had a bad check. They continued to tell me that it is impossible to get the money back because the name on the check was a male's name and she was a female. Previously, she told me that she was purchasing this for her boyfriend so I didn't really think much of it. So my question is, if I have the license number of the woman who wrote the check and the checks are not hers, can I still take legal action? Wouldn't that be considered forging a check? What if the checks were hers? Thanks, this is really on my mind.