why cant i sign things on my android ?

Hi I was in the middle of buying something online on my android HTC desire phone and when it came down to the last purchasing thread I had to sign, my signature but my phone didn't do it . It was just blank and I had to restart all over.

Is there a certent app I need to download to sign for things on my phone such as documents online or on a website ?

 

Sign? Can you be a little more descriptive?

 

Yes sorry I was purchase an item online on my android phone I had to sign a lease agreement and it says I had to sign my name so I tried and my phone couldn't do it.

 

I doubt it. Was the site or whatever specifically for mobile? It might have been intended for a computer and impossible on a phone.

 

The site was Aaron's.com