A system and method of collecting payments facilitates authorized generation of a payment order. A method for cleaning a surface of a substrate, which comprises at least the following steps and, wherein the step is carried out after carrying out the step :Step : A cleaning step of cleaning the surface of the substrate with an alkaline cleaning agent containing a completing agent, andStep : A cleaning step employing a cleaning agent having a hydrofluoric acid content C of from 0. The state machine output also is coupled to a data path controller whose output is coupled to a tag decoder, and to a normal processor receiving output from the barrel shifter unit. Alternatively, if the response time is not acceptable, then putting the client on-hold by redirecting the client to an on-hold server until the response time of the requested server becomes acceptable. The circuit system is disposed in the accommodating space.