--- title: How to Implement POS-Initiated Payments description: 1. Ensure you have reviewed Getting Started with the Doshii Partner API, and are supporting either WebHooks or WebSockets for async communication.  You can only complete payment requests from location --- [Skip to content](https://support.doshii.com/developer-support/hc/en-us/articles/360019105753-how-to-implement-pos-initiated-payments#main-content) English Show submenu for translations Doshii Connect Pty Ltd Open main navigation Close main navigation - English Show submenu for translations - Go to Doshii Connect Pty Ltd Go to Doshii Connect Pty Ltd Help for Partners - There are no suggestions because the search field is empty. 1. [Help for Partners](https://support.doshii.com/developer-support?hsLang=en) 2. [Getting started - App partners](https://support.doshii.com/developer-support/getting-started-app-partners?hsLang=en) # How to Implement POS-Initiated Payments Prerequisites 1\. Ensure you have reviewed **[Getting Started with the Doshii Partner API](https://support.doshii.com/developer-support/hc/en-us/articles/360018043674-getting-started-with-doshii-pos-api?hsLang=en)**, and are supporting either WebHooks or WebSockets for async communication.  You can only complete payment requests from locations that you have subscribed to, so it is imperative to have first implemented Onboarding. 2\. Familiarise yourself with the Doshii **[PIP Sequence](https://support.doshii.com/developer-support/transaction-sequence?hsLang=en)** and **[Transaction Status Flows](https://support.doshii.com/developer-support/hc/en-us/articles/360000657054-transaction-status?hsLang=en)**. 3\. Review Doshii's API [**concepts**](https://support.doshii.com/developer-support/api-concepts?hsLang=en), especially: - **[Hashing](https://support.doshii.com/developer-support/hc/en-us/articles/360000649393-hashing?hsLang=en)** 4\. Check out some of the Frequently Asked Questions - **[Why can't I change the status on a transaction or order](https://support.doshii.com/developer-support/hc/en-us/articles/360000657814-why-can-t-i-change-the-status-on-a-transaction-or-order?hsLang=en)** - **[What do values represent?](https://support.doshii.com/developer-support/hc/en-us/articles/360000657834-what-do-values-represent-?hsLang=en)** 5\. Review [functionality](https://support.doshii.io/hc/en-us/sections/360002407814-Getting-Started) of the Trial Dashboard that will help you with your development. - **[How to Simulate a POS-Initiated Payment](https://support.doshii.com/developer-support/simulate-pip?hsLang=en)**   Certification To complete Doshii Certification for POS-Initiated Payments, here is a broad scope of the use cases we test for: **Additionally**, you will need to be certified for **Onboarding**.   Considerations - As the requests between the POS and Partner are blocking, Doshii has implemented a 2 minute time out for each request (POS requesting a payment, POS waiting for the payment).  In the event the request is cancelled by Doshii as a result of the timeout, the transaction will be marked as cancelled. A new transaction will need to be requested in order to try again. 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