hardcode - Black box test plan to see whether a value is hard coded -

i need make manual test plan (black box testing) see whether value hard coded in drop down list (its' acceptance criteria). can give me suggestions on that?

thanks in advance saj

until describe application bit more hard something.

if can using adming priviliges add/remove values on dropdown test simple.

however if not, if functionality not allow change values on ddl why test then? requirment should descoped part of test report abrevation test plan given resonable why not tested, why cannot tested in black box methodology , approved product owner or bussines users.