Can I hold two Thai visas simultaneously while waiting for approval of a new one?

The user shared their experience of applying for a DTV visa while holding a valid Non-O visa. They were concerned about having two visas simultaneously, as some believe it's not allowed. After submitting their application and paying the required fees, they were informed to return for their passport, leading to speculation about the likelihood of approval. Community comments provided reassurance that having payment taken often indicates approval and discussed the process of canceling the Non-O visa upon return to Thailand. Ultimately, the user received confirmation of their DTV visa upon re-entering Thailand, clarifying that their Non-O visa was effectively canceled.