<ol>
<li>It will recognize the contractor/summoner through moulding their chakra with hand seals, and with their own blood that they signed the contract with.</li>
<li>The contract insures an everlasting validity for summoning the creature.</li>
</ol>

CC BY-SA 3.0
2015-11-27T05:26:46.050Z
2015-11-27T05:26:46.050Z
Happy Face
<p>You can read in the <a href="http://naruto.wikia.com/wiki/Summoning_Technique" rel="noreferrer">Wikia</a> that</p>
<blockquote>
<p>The Summoning Technique is a space–time ninjutsu that allows the summoner to transport animals or people across long distances instantly and <strong>uses blood as a sacrifice.</strong></p>
</blockquote>
<p>In more detail:</p>
<blockquote>
<ul>
<li><p>The contract comes in the form of a scroll, <strong>on which the contractor uses their own blood to sign their name</strong> and place their fingerprints and once signed it is valid even after the contractors death as long as the contract itself remains intact. After this, <strong>they need only offer an additional donation of blood on the hand they signed the contract with</strong>, mould their chakra with hand seals and then plant the hand they signed the contract with at the location they wish to summon the creature.</p>
</li>
<li><p><strong>It should be noted that anyone can summon a contracted animal as long as they have the blood of someone who has made a contract</strong>, the seal of the summoned creature and a source of sufficient chakra that the summon will accept.</p>
</li>
</ul>
</blockquote>
<p>So basically, <strong>the blood serves as a means of identifying the summoner for the summoned and also acts as a price (sacrifice) for calling them.</strong></p>

CC BY-SA 3.0
2015-11-27T11:30:31.493Z
2015-11-28T04:46:03.137Z
2020-06-17T09:17:53.303Z
Ashishgup
<p>In Naruto, I have seen that to create summoning contract and to use summoning jutsu, the user uses their own blood.</p>

<p>Why is this required? What is the significance of using blood here?</p>

<naruto>
Why is blood needed to sign a summoning contract and to use the summoning jutsu?
# Why is blood needed to sign a summoning contract and to use the summoning jutsu?
Posted by: username_0 on 2015-11-27
In Naruto, I have seen that to create summoning contract and to use summoning jutsu, the user uses their own blood.

Why is this required? What is the significance of using blood here?
**Tags:** naruto
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## 2 answers
### Answer by username_2 on 2015-11-27. Score: 7 | Accepted answer
You can read in the [Wikia](http://naruto.wikia.com/wiki/Summoning_Technique) that

> The Summoning Technique is a space–time ninjutsu that allows the summoner to transport animals or people across long distances instantly and **uses blood as a sacrifice.**

In more detail:

> * The contract comes in the form of a scroll, **on which the contractor uses their own blood to sign their name** and place their fingerprints and once signed it is valid even after the contractors death as long as the contract itself remains intact. After this, **they need only offer an additional donation of blood on the hand they signed the contract with**, mould their chakra with hand seals and then plant the hand they signed the contract with at the location they wish to summon the creature.
> * **It should be noted that anyone can summon a contracted animal as long as they have the blood of someone who has made a contract**, the seal of the summoned creature and a source of sufficient chakra that the summon will accept.

So basically, **the blood serves as a means of identifying the summoner for the summoned and also acts as a price (sacrifice) for calling them.**
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### Answer by username_1 on 2015-11-27. Score: 1
1. It will recognize the contractor/summoner through moulding their chakra with hand seals, and with their own blood that they signed the contract with.
2. The contract insures an everlasting validity for summoning the creature.
---
