While it is always best to get a promissory note, it is not necessary to prove the existence of a loan. You will have to be able to substantiate the payments made to the person or on their behalf were more than just a mere gift, which can be done through testimony. Depending on the amount you loaned the person, you can sue in small claims division of the district court if the amount is $2000 or less, if not you bring suit in the district court where the person lives. You can get forms to file suit by going to the clerk's office at the district court and they will give you instructions for filing. You should get the check receipts and credit card receipts as well as any bank statements showing the deduction of those amounts from your account and make copies of them for evidence to attach to your claim. You can also sue for attorney's fees if you choose to get an attorney to represent you.
I hope you found my answer helpful, please click on the GREEN ACCEPT for each of my answers. This is necessary for me to be paid for my work and so that I can get credit for assisting you. Your question will not close, and you will still have the opportunity to follow-up if needed. Leaving a bonus and positive feedback is not required, but doing so is certainly appreciated!
If you have additional questions, please keep in mind that I do not know what you already know or don't know, or with what you need help, unless you tell me. Please consider that I am answering the question or question that is posed in your posting based upon my reading of your post and sometimes misunderstandings can occur. If I did not answer the question you thought you were asking, please respond with the specific question you wanted answered.
Also remember, sometimes the law does not support what we want it to support, but that is not the fault of the person answering the question, so please be courteous.
There can also be a delay of an hour or more in between my answers because I may be helping other customers or taking a break.