Hinduism states that there are days which are considered as inauspicious for Death.
If one dies on these specified days, Parihara, Atonement is recommended.

Commonly held belief is that if the Pariharas are not done, more deaths would follow.
I am not too sure about this.
What I am certain is that these deaths bring in Pitru Dosha and Pariharas are necessary.
The Days inauspicious for Death fall under three categories.
Relating to the Nakshatras, Stars.
Rohini, Dhanishta, Satabhisham, Purvabhadra, Revathi, Mrugasira, Punarvasu, Uttara, Chitra, Visakha, Uttarashada, and Magha.
Thithis, Waxing and Waning of the Moon.
Padyami, Vidiya, Shashti, Ashtami, Ekadasi, Dwadasi, Trayodasi, Chaturdasi and Amavasya.
Days.
Sunday, Tuesday, Friday and Saturday.
Some Smritis offer the following Parihara.
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If a death has only one dosha the family members should leave the house for 1 month
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If a death has two doshas the family members should leave the house for 6 months.
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If a death has all the three types of doshams the family members should leave the house for 1 year.
As this is not practical now a days, there are other Pariharas as well.
- Pitru Tarpan Pooja (Shraddha Pooja) needs to be done at home with 5 dolls made of Darbha (Kusha Grass) & White Cotton.
Prana Prathistapana ritual (infuse life in the Dolls) ceremony of the 5 dolls needs to be performed.
After Pooja, these 5 dolls should be buried in sand or mud near River or Sea shore.
Or perform Rudrabhisheka at home & offer food to ancestors.
This pooja needs to be done without fail, otherwise dosha will not be removed.
- Nakshatra Shanti pooja & Navagraha Shanti Pooja need to be done for nullifying the affect of Dosha.
- Perform Mahamrityunjaya Homa/Japa at home after the above pooja’s are done.
Or Visit Gokarna or other Pitru Parihara Sthalas and offer Sraddha.
Nine Temples foe Pitru Dosha Parihara
References.
http://www.oursubhakaryam.com/DEATH%20DOSHAM.htm
http://someshsastroworld.blogspot.in/2013/01/nakshatra-dosha-due-to-inauspicious.html

Dear Sir
My daughter passed away on 27.10.2020 at the age of 7 years 6 months. is there is any dosha if yes please suggest the remedies.
No.
Hello sir
my husband recently died on Tripada Dosha ,(AStami,Avittam and Friday)I did grekiyam and thanista panchami related poojA yagam with the help OF TWO RITUAL POOJA PERFORMER (Brhmanar gurukkal) to remove adaippu thosham. FROM MEENAKSHI TEMPLE .we have donated oil after seeing the face and also we did all the final rituals , Ritual performer says it will be enough
what about your opinion sir
Visit any of the Pitru Dosha Parihar temples as mentioned in my article. Google Pitru Dosha ramanan50. feel what you have performed is enough