May I leave Vietnam via different registered exit port?

May I leave Vietnam via different registered exit port?

The e-visa application asks you to list entry and exit ports. I know where I will enter Vietnam but I actually don’t know yet through where I will exit Vietnam. May I leave Vietnam via different registered exit port?
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The entry and exit port is registered when you applied for e-visa. You are not allowed to enter Vietnam via different registered entry point but no problem if you change the exit point.