What is the name of the compound Sc(HCO2)3?
The formula you have is definitely scandium formate. There is one of four reasons why someone (like your instructor or your online homework service) might tell you that scandium formate is wrong.


Someone wants you to call this compound scandium(III) formate because scandium can have multiple oxidation states.
Someone wants you to call this compound scandium methanoate (or scandium(III) methanoate) since methanoate is another name for the formate ion.
You are correct and your instructor is wrong (or your assignment software has the wrong answer keyed in). 
There is a typo in the formula you were given.