With the upcoming of ubiquitous computing, banks and financial institutes 
meet new chances and challenges in their business. The goal of this paper is 
to identify requirements and test technologies for ubiquitous payment 
(u-payment). The work was done in a joint research project of our research 
team and United Bank of Switzerland (UBS). To derive the results the project 
team conducted interdisciplinary innovation workshops, built demonstrators and 
analyzed user and UBS experiences. The paper first evaluates the key features 
of u-payment in comparison to mobile payment (m-payment). Then, it describes 
the Preferred Payment Architecture (PPA), which is developed by Mobey Forum, a 
global, financial-industry driven forum. UBS is one of the founders of the 
forum and presses ahead with this architecture as this recommendation 
implements the requirements of customers, financial institutes and merchants 
in equal measure. The research team developed the test platform BluePay, which 
implements some chosen requirements of PPA in order to gain experiences with 
local payments in a store with the technologies Bluetooth and Radio Frequency 
Identification (RFID). The main results of this work are a definition of 
u-payment by the authors as unobtrusive, ubiquitous, invisible, and in the 
environment integrated payment, an evaluation of technologies and requirements 
of the u-payment system demonstrators, and some implications for the adoption 
path from m-payment to upayment.