You will never need to cancel a gig that you bought

I think the buyer should always get the information about the gig (by carefully reading the description).
If he purchases the wrong gig he will surely have to cancel it.
So please keep this in mind while purchasing the gig, get the information about the gig you are purchasing.

First of all make sure that you read the details that are already given in the description of the Gig, and before you order, ascertain that you have understood every bit of it. If in doubt, ask questions. Don't buy, and THEN ask questions.

That(asking questions) is what you can do before ordering any gig.
You must also see the time duration that the seller will take to deliver your order. Don't end up buying a gig that will take 3 days to deliver, when you want your order to be delivered in just 1 day.

http://fiverr.com/danish82/write-on-any-subject-with-my-creative-knowledge

http://fiverr.com/danish82/proofread-and-edit-your-document

Happy gigging :bz