Methods and apparatuses are disclosed for improving transaction success rates for voice reminder applications in e-commerce. In one embodiment of the invention, the voice reminder applications in e-commerce utilizes a network-based text-to-speech (TTS) alert system, which can generate a purchase reminder associated with a recipient's potential purchase. The network-based text-to-speech (TTS) alert system can also deliver the purchase reminder to a recipient's voicemail and leave a transaction identifier number and a centralized or a recipient-specific call-back phone number to the recipient's voicemail. A recipient can utilize the transaction identifier number, the centralized or the recipient-specific call-back phone number, and optionally a recipient-specific password to make a phone call to retrieve the purchase reminder previously delivered to the recipient's voicemail by the network-based text-to-speech (TTS) alert system. Then, the recipient can authorize and/or complete a transaction related to the purchase reminder over the same phone call.