Do i need to get finance documents notarized?

[aditi123]

I am applying for a COS from H4 to F1 and will be joining school in fall2013. My sponsors are : my husband and my father-in-law.

As proof, I would be submitting bank letters,I-134(husband) and supporting letters signed by my sponsors.

Here's my question:

For my Father-in-law's(India) supporting letter, do I need to get it notarized(since I am not submitting a I-134 signed by him)?

I would be doing this only if absolutely essential, as i am already late for my COS application.

Thanks a lot!

Aditi.