●What is the maximum number of withholding that can be signed by the same merchant?
There is no limit. As long as the current withholding order is completed, the next withholding order can be processed.
●After the "Mini program signing" of entrusted withholding interface is called: "Parameter construction error" is returned.
Please check according to the following process:
Check the correctness of the parameters against the document sample.
Check whether the appid and the merchant number are bound
●How can the callback information be received if the user or the merchant initiates the termination of the agreement?
Please check according to the following process:
After the user voluntarily cancels the contract and the merchant initiates the cancellation request successfully, there will be a termination callback notification.
The termination notification address will be filled in when the template ID is created. Only one ID can be filled in each template, and different template IDs can be configured with different cancellation callback addresses.
●When the "Apply for deduction" of entrusted withholding interface is called: "The security key lock has been opened to interdict the signing of the contract. Please contact the bank" is returned.
This is because the user has set the restrictions on the bank card. The user needs to contact the bank to close the security lock before retrying.
●After the deduction is initiated, can the same "out_trade_no" be used to initiate a deduction again if the previous one fails?
Please check according to the following process:
Check the order status first, and then decide whether to use the original order number to initiate the deduction again according to the order status.
If the query result is "Order closed" or "Order paid", the deduction can not be initiated again under the original order number.
If the query result is "Order unpaid" or "Order does not exist", the deduction can be initiated again under the original order number
●Returning from the entrusted withholding interface "Navigate to mini program": navigateToMiniProgram:fail
Please add WeChat signing program appid to the navigateToMiniProgramAppIdList of the applet profile app.json.
