5 years ago I sold a building and set it up as me loaning the new buyer the money (like a mortgage). He has been paying his monthly payments but 2 months ago called to tell me that he would not be able to pay me the balance of the loan that is due at the end of may. as per the agreement of the loan we will be repossessing the property at the end of the month. We have now been notified that he owes a lot of back taxes on the property. Do we inherit this debt or is that his problem?