If a person reads out loud (with no intention to make a vow) a writing where it is written that, "I vow to fast for one day.", is it a duty of the person who read the writing to consider his reading a vow and is it a duty of him to fulfil this vow?

All perfect praise be to Allah, The Lord of the Worlds. I testify that there is none worthy of worship except Allah, and that Muhammad is His slave and Messenger.

Whoever reads “I vow to fast for one day”, he is not obliged to observe a vow, because the matter was that he merely read a written statement without intending to fast or intending a vow.

In addition to this, the expression that is mentioned does not indicate a vow.

Allah knows best.