visa for Aunt living in south africa to visit niece living in spain

• Can someone please help me get a letter of invitation to send to my aunt to visit with me.
  I have been to the policia naccional in sevilla
  twice now. They seem to want all documentation of which i have no objection to supplying. but to send my late parents death certificates as well as my late grandfather's who died in 1964.
  and have them sent to south africa to be translated and then back to spain again seems ludrcious to me. Then in the next breath tell me that if I get an hotel reservation i do not need all the red tape that goes with it.
  My aunt is a 78 year old lady and all she wants is to visit her niece for three weeks this summer. I would appreciate it if somene could shed my light on this. As the spanish embassy in cape town south africa says that all i need to do is go to the police station and get a letter of invitation which i then am suppose to fill in and send to her travel agent in south africa. Simple not so.
  I look forward to someone replying to this for me.
  J.M.W.

  05 jun 2008, 05:10 Mrs J. M. Watkins