I've been on Fiverr for some time now though still a new seller. With experience gathered though not on Fiverr platform, I will suggest or rather advice that you stay clear from such buyer reason been that at the end of the project, if he/she isn't satisfied even after numerous corrections and requests for a full refund, failure to comply to his bidding might make him/her give you a negative review or even report your account and these things have a way of denting your profile.
if after sending samples of your work to the buyer and he/she isn't satisfied please avoid that project.