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    Popular Developer Topics/Articles

    General Qu icon
    General Queries
    Are the Merchant Id and merchant key same?What special characters are allowed in Order Id?Where can I see transactions of my customers?More show more arrow - rightFAQs
    Testing an icon
    Testing and Integration
    What are the different test instrument & their details for the testing environment in the payment gateway?I am getting Invalid mid issue?Where do I get the Test/Production credentials e.g. MID, merchant key etc?More show more arrow - rightFAQs
    Checksum icon
    Checksum
    What is Checksum and how is it generated and verified?What is the usage of merchant key and is it used as parameter for the checksum generation?Why am I getting a Checksum mismatch/Invalid checksum in the response from Paytm?More show more arrow - rightFAQs
    Callback U icon
    Callback URL
    What is the call back URL?Can we configure different call-back URL for succesful and failed transaction?Is it possible to have the same call back URL for WEB and WAP (App)?More show more arrow - rightFAQs
    App/SDK In icon
    App/SDK Integration
    Do Paytm All-in-One SDK supports both Android & iOS?Where do I find the Android/iOS SDK?For Android and iOS how will the checksum generated?More show more arrow - rightFAQs
    Website/Pl icon
    Website/Plugins Integration
    How will the checksum be generated for website integration?How will the checksum be verified for website integration?What is the use of Paytm payment plugin and where can I find the latest version?More show more arrow - rightFAQs
    Refund icon
    Refund
    What is Refund Reference ID and why is this needed?What are the Constraints on refunds?How is refunds are managed in Payment link?More show more arrow - rightFAQs
    Subscripti icon
    Subscription
    Will Paytm auto-deduct the payment every frequency cycle?Does Paytm send any notifications to the users?Can I modify an existing subscription?More show more arrow - rightFAQs
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