16 days ago I sent a validation letter to a collections agency in reference to a out credit card bill that has

pasted the staute of limitations. I sent it certified. What do I do now? No response obviously, do I send another one? Im trying to do this the right way. Any help is appreciated. IF YOU HAVE NOTHING NICE TO SAY THEN DONT SAY IT. This is to a debt I can not afford which is my parents fault. Myy other debt that I am responsible for I am paying so keep your rude comments at bay.