A transaction and payment system comprising a transaction server system configured to provide secured payment transactions between a consumer and a supplier, wherein the consumer and the supplier respectively are registered users of the transaction server system, wherein respective payment details related to user accounts of the respective users are stored in respective data sets of respective consumers and suppliers stored in the transaction server system, wherein each registered consumer and supplier is registering a user defined geometrically shaped model of a respective consumer field and a supplier field, representing respective geographical spaces wherein a payment transaction can occur, wherein the transaction server system is configured to receive and update and record data of geographical positions from geographical position transmitters associated with registered consumers and suppliers, and the transaction server system is configured to follow movements of consumers based on the received and recorded geographical positions, and whenever relative movements between a first consumer and a first supplier is providing a situation wherein the user modelled consumer field of the first consumer is partly overlapping the supplier field of the first supplier, such that the transaction server system is configured to establish a transaction and payment union between the first consumer and the first supplier within the transaction server system thereby enabling a secured transaction and payment system between them comprising a first secured communication link between the first supplier and the transaction server system, and a second secured communication link between the transaction server system and the first consumer, wherein the second secured communication link is established by authentication of the first consumer when the transaction and payment union is created, wherein the secured transaction and payment system includes a first transfer of a sum to be paid by the first consumer from the first supplier to the first consumer via the first secured communication link between the supplier and the transaction server system, wherein the transaction server system is further configured to submit to the consumer via the second secured communication link the sum of money to be paid, wherein the first consumer authenticates the sum to be payed by a second transfer transferring an accept of the payment to the transaction server system via the second secured communication link, when the consumer accept is received by the transaction server system, the transaction server system is configured to collect the stored payment details stored in the data sets of the respective first supplier and the first consumer, and to finalize the payment by transmitting the transaction details regarding the payment to a payment processing network, the transaction server system is further configured to cancel the secured transaction and payment system if the relative movement of a consumer with respect to a transaction and payment union as detected by the transaction server system is providing a situation where there is no longer a partly overlapping of the consumer field and the supplier field constituting the transaction and payment union.