Palm off as
Definition 1 of 1
Pro Tip 1/3Deceptive Intent
Implies the person using it intends to deceive others by presenting something fake as real. 
Be careful at street markets, vendors might palm off replicas as genuine merchandise.
Pro Tip 2/3Negative Connotation
Using 'palm off as' suggests a negative judgment about the action, showing disapproval. 
She scorned the salesman for trying to palm off damaged goods as new.
Pro Tip 3/3Subtlety and Skill
The phrase often implies skill or craftiness in the deception, not just a straightforward lie. 
The forger was skilled at palming off his forgeries as originals to unsuspecting buyers.