cashier's check vs credit (from seller) at closing

[Young C.]

Hello BP members,  

I'm negotiating with a seller after an inspection to purchase a residential property.  The seller offered a casher's check of $X at closing, instead of crediting back the $X amount to the settlement statement.  My question is.. are there any differences between the two forms of getting the repair cost?  This is probably a dumb question, but I don't want to assume anything that I am not certain as a newbie.  I would think I just need to pay a full closing cost at closing and deposit the casher's check after closing.  Am I missing something here?  

Thank you!