How To Leave A Tenancy Agreement

Can I negotiate that they pay until date x or until a new tenant is found earlier? This seems like a win-win situation for both, as there would be no interruption in cash flow and tenants could leave earlier (and wouldn`t be responsible for more rent once the new tenant is found). My client wishes to terminate his contract with his tenant earlier than the authorized contract. We rented an apartment to a lady who has just graduated and is looking for work. She had a brilliant guarantor with perfect references. Nothing about this woman would make you suspicious in any way, form or form. .