Custom or commission work is any part or piece of glass, metal, wood, or any combination of these or any other material of this world or another that is purchased, borrowed, obtained, fetched, or procured for the purpose of executing any part or piece of the requested end result for you the customer. Commission work always....always requires a deposit. The deposit is always non refundable. Final payment is due in hand upon receipt of the final product. Unless agreed to otherwise in writing there are no exceptions. For these reasons commission or custom work generally comes with a contract (see below).
If you do not have a fully executed signed contract in place stipulating different terns than outlined in the commissions policy above then the commissions policy is considered to be legally binding and supersedes any and all other verbal and/or non-verbal agreements.