If I am the conservator of my grandchild and have been for approx 6 years........do I have to have the parents permission to change my grandchilds last name?.....She is turning 8 and that is what she wants for her bday is for me to change her last name to the same as mine.

Do I have enough evidence to sue an ex-tenant for back rent? We had an oral agreement for $1000 the 1st of each month. He did'nt pay me from 2/1/08 to 3/8/08 when he left. I have checks I cashed for him from his employer showing his name with my property's address listed.