Today being Aadi amavasai, I would like to share this story told by Periva about the importance of certain rituals.
A person had sent his son to the city for higher education. The son had his exams coming and had to pay the fees for it next day. So he sent a message to his father requesting him to send a telegraphic money order as soon as possible.
The father knew telegram and money order as separate services but could not make out what telegraphic money order meant. So he went to the post office and asked the operator there that he wanted to send a telegraphic money order and handed him the rupee notes.
He thought that the operator would punch that rupee note and send it through - like in the telegram.He received the cash and placed it inside the cash drawer and gave him a receipt for the money and said that the money will reach the stipulated person on time.
But he observed that the operator did not do anything to the rupee note like punching it or sending it through the string etc. So he asked the operator if his money has been sent or not as the cash that he gave the operator lay there at his table. The operator replied again that his money will reach and started to type a telegram as well - making the typical “kat-kat” noise.
The father wondered “this man is making some kat-kat noise and telling that the money will reach. But the cash that I have given him is lying at his table. How will the money reach?”
But the money did reach his son on time.
The same thing happens when we perform our pitru karmas. whatever we give, we should do it according to the rules prescribed in the sastras, and if done so, the pitru devatas would certainly recognize it and deliver it to the concerned person.
If the concerned pitru is born as a cow in his next birth the devata delivers it as a straw or if he is a horse it is given in the form of grass.
The pitru devatas possess this power to recognize and deliver accordingly, which is given to them by Parameshwaran (God Almighty). So there is no necessity for your mother or father to come directly to collect what is given by you.
In the above story the same rupee notes that you gave the telegram operator do not reach the specified person through the telegraphic money order. The recipient does get the money or the equivalent value – though not the same rupee notes that you paid. In case the receiver is not in India, if you sent rupees it is converted into dollars or pounds or any other currency that is accepted in that country.
In as much the same way, whatever you give here in the form of brahmana bojanam or tharpanam, will reach the pitrus in a way that is required for them in their present form.