The certificate of payment and right to reimbursement is a contract right between the City and the applicant. The certificate shall at a minimum identify the person receiving the right of reimbursement, the reimbursed amount per unit, the area of the Reimbursement District, the date of district formation and the date upon which the right to reimbursement ends. The requestor's right to reimbursement is assignable and transferable after written notice is delivered to the City advising the City to whom future payments are to be made. The certificate shall also provide that the applicant shall defend and indemnify the City from and against any and all challenges to the formation of the reimbursement district or the collection of the District Connection Charge.