What to do when vow has been broken by a person? Can any prayaschit is there What are the Prayaschitta measures for breaking a vow??? Here Here the vow maker taken aperson(who took the vow) took it without knowing anything about it. Now Now what kind of punishment(as per Scriptures) must the aspirantone undergo for the breakage ofbreaking such vow??? Here the vow maker took a vow to complete a vow when he gets job and in his mind he was thinking of a govt job but now he get a private job. Shall he have to fulfill his vow ??? Does his words taken into consideration or what he think will be taken into consideration???if he fulfill it now then it will be consider na that his vow is completed and when he get govt job then he don't have to do it again???
Taking Vows and accomplishing them is related to personal belief. So, scriptures (Dharma Sastras) don't explicitly mention rules about "Vows".
This is what an Acharya from Telugu states says (Video in telugu)
People take vows to fulfill their wishes or to get rid of their wordly difficulties (iShTa or kaShTa). Now, arises the doubt of Sastra Pramana for vows. For example, if a burglar takes a vow to not get caught and police officer takes a vow to catch him and if both of them take vow to same God, then which vow God should fulfill? So, it is purely related to personal belief. It's always better to fulfill the vow in same temple, as this is related to belief.
Generally we feel there's no need to fulfill our vow if our problem is not solved. But our conscience should agree with it. Lord knows what is correct and not correct. For example, if we want to meet a person for some urgent work and if we are waiting for a bus to go to his city and bus got delayed, we ask God to send bus early and may take a vow to visit temple if it fulfills. But we miss the bus and it turns out the person whom we want to meet stays in the same city we live and we saw him in Bus Station. Here, we didn't know what was correct but Lord helped us. We may not get what we wish, but Lord grants the correct or beneficial thing to us. So, it's always better to fulfill our vow even though our particular wish is not fulfilled.
It's always better to fulfill our vow, irrespective of what we get. God owes us if we do that, as said by Mylavarapu Srinivasa Rao in this video (Telugu). So, instead of Prayaschita, we can fulfill vow or from above statements, fulfilling vow can be considered as atonement.
Suppose, a person goes to a temple and makes the following promise in front of god - "If this particular wish of mine is fulfilled then I am going to do this in return", then once his wish really gets fulfilled he better fulfill the promise too. Because, otherwise it is considered as an offense.
Now if anybody makes a false promise or swears falsely, taking the Tûlasî leaf in his hands, if anybody makes a false promise, taking the Ganges water, S’âlagrâma stone, or any other images of God in his hand; if anybody swears falsely, placing his right palm on the palm of another; if anybody swears falsely, being in a temple or touching a Brâhmana or a cow; if anybody acts against his friends or others, if he be treacherous or if he gives a false evidence; then all these persons go to Jvâlâ Mukha hell, and remain there for fourteen Indra’s life periods, chastised and beaten by My messengers and feeling pain as if one’s body is being burnt by red hot coal.
Devi Bhagavatam Book 9, Chapter 35
(NOTE - This is only a partial answer as I have not given any praysachittas yet)