IMPORTANT! Always check your Seed twice.

[DaNNy001]

Unless you have been a victim of writing the wrong word of a Seed down or the incorrect order of it, you do not know how frustrating and desperate such a mistake can make you feel.

When creating a new Seed, always double check its validity.  Not only by writing it down and double checking it with your own eyes.  To me, even if the Wallet checks two or three words, it means nothing.  There could always be an error and I try to minimize it.

The way I do it is as soon as I write down the Seed, I close the Wallet, then re launch it and use the Restore option.  Enter the Seed from the paper I just wrote and go from there.

I wrote words in the wrong order before and at first glance it looked right.  Next time I had to restore my Seed from my paper, it said it was wrong.  I got desperate for days, until I tried to swap the word with the previous and luckily it did work for me.

Check your Seed twice.  Do not be lazy.

It's like you actually saw what happened to me  because I have faced this kind of situation and just like you stated it, I even wrote the phrase down but didn't do a back check to confirm if the words are correct enough although at the first import of the phrase, I actually was minimizing my phone and checking the phrase I wrote on keypad and inputting it to the space on the wallet and after the wallet was successful created I wrote it down but unknown to me that the words I wrote down were not in the same order(spelling) and later found this out when I actually changed my device to which my wallet was and in puting the phrase to this new device the error of wrong phrase keep popping and believe it was like a nightmare I wouldn't want to relive so I tried changing some of words and luckily for me, it was a misspelled word that was the case for my own.

so doing a double check on seed phrase is something that worth it, you never can tell what error you might have made #dontbelazy

[Peanutswar]

In my daily routine, I always check my account's security, updates, notifications etc. just to make sure all things are safe now, even small details that you can overlook will now risk your information or even the asset.

I wrote words in the wrong order before and at first glance it looked right.  Next time I had to restore my Seed from my paper, it said it was wrong.  I got desperate for days, until I tried to swap the word with the previous and luckily it did work for me.

Those days we want to make sure our wallets are safe we think of shuffling the words but let's be true most of us don't have the full capability to remember the things we made after weeks or months so i guess this idea could ruin yourself. I guess not only the seed but also the device we are using even though we say it's safe its different if you have another layer of security on it to prevent getting compromised most likely with the hot wallets, but if you are in cold wallets, natural occurrence is most likely your enemy.

[Y3shot]

The seedphrase is as important just like the money you have in the wallet and it should be treated very well because if their is anything wrong with the seedphrase it is impossible to have access to the asset in the wallet.  It is good to cross check the seed phrase very well after copying it down. it is necessary to check if their was any error in spelling or wrong position of the 12 word of the seedphrase. Most of us are so fast in collecting our seed phrase without giving it much attention.

[Richbased]

What I normally do whenever I create a new seed is to snap it with another phone because I don't like stories that touches the heart as most times I normally create new seeds for several purposes so am always very careful with it. After snapping it then I write it down in my diary book and check very very carefully before I delete it from the phone though what I normally do most times is to rephrase the whole words in case someone incidentally gets access to my diary book and sees it so that's the safe way I normally do in other to protect my seeds.

Firstly taking a shot of that seed phrase is a bad because it can get exposed to the internet later, yes you might be using the phone offline at that time and later delete it but do you know that the deleted file will be save in your trash and later the deleted image will be exposed to cloud where most phones automatically store your photos?

You're correct on the seed phrases getting exposed to the internet later but it's dependent on the kind of camera with which is being used to capture the seed phrases because not all camera gives the phone access to store files deleted on cloud and if it doesn't involve a camera that stores trashes for some interval of time before it gets exposed to cloud how will it be exposed and besides not all phones automatically stores photos on cloud.

Also rephrasing your seed phrase or even arranging them in any other order can be a security risk because you trust your head to remember how you got them arranged or rephrased and this can be mixed up later as it is bad culture to rely on your head to always remember things like this.

I've done more important things, even passwords by rephrasing them for so many years now and believe me my brain captures exactly how I manipulated everything and I've never gotten any mixed up in the course of me rephrasing some important things that I don't want anyone to understand except me though your advice is welcomed. I know the reason why you assume it to be a bad culture because of if it involves a long time that I might forget how I rearranged everything but trust me I'm very good at remembering how I manipulated anything that's of importance to me even in the long run.

What I normally do whenever I create a new seed is to snap it with another phone because I don't like stories that touches the heart as most times I normally create new seeds for several purposes so am always very careful with it. After snapping it then I write it down in my diary book and check very very carefully before I delete it from the phone though what I normally do most times is to rephrase the whole words in case someone incidentally gets access to my diary book and sees it so that's the safe way I normally do in other to protect my seeds.

Zaguru12 has corrected this already. It is not good to take the screenshot of your seed phrase. Just use a good wallet like Electrum and make your backup offline. Do not also rephrase your seed phrase, you can just extend it with passphrase. With passphrase, the wallet will generate different keys and addresses. Anyone that will need to access the wallet needs the passphrase. Backup your seed phrase and passphrase differently in different locations. Having like two or three backups each.

Though I don't do screenshots but however, I concur to your advice of running an offline backup on electrum of which I use electrum wallet and extending it with passphrase in other to generate different keys and addresses is also a welcome idea and I must say thank you for the advice.

[BitcoinPanther]

Check your Seed twice.  Do not be lazy.

This is a simple and yet very important reminders for people who wanted to or prefer to jot down their seed phrase in a paper than saving it on a notepad.  Although I don't use this method (manual writing on a paper) since I am using electrum, I can copy it on a notepad and print it on a paper if I wanted to save a back up of the seed phrase outside my computer.  Aside from that I always get the private key of the address I used for receiving and then import it to just have a solo address for receiving(this is to prevent remaining BTC to be sent to other address when transacting part of the BTC held on that address).  This way I have two options in recovering the address, one is through the seed phrase and the other one is through the private key.

[Zaguru12]

You're correct on the seed phrases getting exposed to the internet later but it's dependent on the kind of camera with which is being used to capture the seed phrases because not all camera gives the phone access to store files deleted on cloud and if it doesn't involve a camera that stores trashes for some interval of time before it gets exposed to cloud how will it be exposed and besides not all phones automatically stores photos on cloud.

That could be phones but normally all the phones this days actually are a risk apart from the cloud there are other apps that collects informations like this but you can’t be too sure, once a phone has actually been connected before to the internet then it is at risk. This is part of the reason why wallets blocks taking screenshots of seed phrase. The best thing still remains retyping it just like electrum does.

I've done more important things, even passwords by rephrasing them for so many years now and believe me my brain captures exactly how I manipulated everything and I've never gotten any mixed up in the course of me rephrasing some important things that I don't want anyone to understand except me though your advice is welcomed. I know the reason why you assume it to be a bad culture because of if it involves a long time that I might forget how I rearranged everything but trust me I'm very good at remembering how I manipulated anything that's of importance to me even in the long run.

Ever heard of an accident that causes Amnesia? Accidents are unpredictable just like death, so no matter how sound you think your brain is it is bad to actually depend totally on it. Don’t be too confident on your remembering ability. Backup your seed offline in the correct order and add a passphrase.

[sokani]

Thanks for this advice. Normally, I take my time to look at each word carefully as I write them down on a piece of paper and so far I've never had any issue. Your approach is the best and it'd safe one from making a costly mistake. Imagine stacking Bitcoin in your wallet, and unfortunately you lost your device and you wanted to import your seed phrase into another device, only to discover that you made a mistake during backup. Damn! It'd be too painful.

[Coyster]

This is a simple and yet very important reminders for people who wanted to or prefer to jot down their seed phrase in a paper than saving it on a notepad.  Although I don't use this method (manual writing on a paper) since I am using electrum, I can copy it on a notepad and print it on a paper if I wanted to save a back up of the seed phrase outside my computer.

I don't understand why you would want to go through this hassle, just generate your seed phrase and write it down on paper, your seed phrase should not be written in your notepad or stored somewhere in your computer.

Aside from that I always get the private key of the address I used for receiving and then import it to just have a solo address for receiving(this is to prevent remaining BTC to be sent to other address when transacting part of the BTC held on that address).  This way I have two options in recovering the address, one is through the seed phrase and the other one is through the private key.

Using one address only is not good for your privacy and there is no need to back up a private key belonging to one of your addresses. You are somewhat complicating things imo, just do it the "simple" way, back up your seed phrase which can generate all the addresses in your wallet and keep the backup very safe.

[Vaculin]

Not only twice but even a lot of times. Your seed phrase is your main entrance to your wallet, if one is missing, you will definitely not access your account. If you can create a back up for your seed phrase, then it would be much better so it will be more safe and secured.

Also, keep your seed phrase privately and never try to disclose it even to the closest around you. Once you break this, then you can never have your wallet anymore as there could be someone who's already accessing it and steal all your funds.

[Mr.suevie]

This is an important note, because one can never be too careful. I could only imagine the horror one would be faced with when he or she found that she actually made mistake in writing his seed phrase  😱😱. That's why I always check thoroughly so that I won't be a victim of my own mistake, I have heard stories of actually losing their Bitcoin in their wallet all in the sake of no way to actually recover the seed phrase to the wallet and sometimes it actually made me wonder if actually there is no way around such situation at all🤔🤔.

[Mr.right85]

I wrote words in the wrong order before and at first glance it looked right.  Next time I had to restore my Seed from my paper, it said it was wrong.  I got desperate for days, until I tried to swap the word with the previous and luckily it did work for me.

Check your Seed twice.  Do not be lazy.

It would have been a hard to believe thing that someone could write his or her seed in the wrong other. I get it that, people could write things in the wrong order but when it comes to seeds, it’s something that I don’t see to be a common occurrence.
Why is that?
By the default, it’s a standard procedure that your seed be entered in its right order or sequence. This follows, a procedure that would have necessitate your writing down of the seed during wallet creation and a strict warning on importance to privacy.
Should you have followed the instructions and written down the seed as they are given, the sequence would be okay. I’m an event where the seed happens to be wrong, chances are, you might just have an empty wallet and could go about creating a new one.
Still, it’s not a bad advice to give these means to safety and privacy some extra care.

[Mpamaegbu]

When creating a new Seed, always double check its validity.  Not only by writing it down and double checking it with your own eyes.  To me, even if the Wallet checks two or three words, it means nothing.  There could always be an error and I try to minimize it.

When I create a fresh wallet and I'm copying out the passphrase, I'm always mindful of word spellings. You know the word, "colour" isn't spelt that way by American. It's "color" for them. That difference can lock one out of one's wallet if a single word isn't put in its right place, either by spelling or sequence. I'm always meticulous whenever I'm downloading or registering stuff online. I put every other thing on hold until I'm done. That way, I haven't been a victim. That's my little secret.

[PrivacyG]

This isn't even enough: you should check if the seed creates the same address again.

Why though?

I would never even try to copy an Address from a Seed that I have not backed up properly.  To me the verification part of my paper is part of a proper backup.  No point in writing down a Seed that may be wrong by a human mistake.

Since the Seed will not be used at all before I restore, the worst thing that could go wrong is I wrote an invalid Seed in which case I have to redo the entire process or I just restored a valid Seed that I some how managed to mistakenly create by my own mistype.

Is there a risk I am missing on?  I suppose it is that you are afraid the mistype will significantly reduce the security of the Seed?

(of course running offline, air-gapped, running a Live Linux DVD from RAM, with the curtains closed on a computer that I'll burn in holy fire afterwards)

You are taking the definition of extreme paranoia to a completely different level.  Not that I do not like it though, the more precaution the fewer the worries.

[LoyceV]

This isn't even enough: you should check if the seed creates the same address again.

Why though?

I like to be thorough, it prevents making a mistake when you enter the seed. Let's say you created Seed A, and wrote down Seed A. You wiped and restored the wallet, but when you entered it, you typed a wrong word. Murphy's Law made it a valid seed. Now you have a working wallet, but your seed backup doesn't match. That's exactly the scenario you tried to avoid.
If you would have written down the first address created by the wallet after it first produced that seed, you would have caught this mistake.

(of course running offline, air-gapped, running a Live Linux DVD from RAM, with the curtains closed on a computer that I'll burn in holy fire afterwards)

You are taking the definition of extreme paranoia to a completely different level.  Not that I do not like it though, the more precaution the fewer the worries.

Obviously I don't have holy fire, but indeed, peace of mind is the main point.

[Cricktor]

What I normally do whenever I create a new seed is to snap it with another phone because I don't like stories that touches the heart as most times I normally create new seeds for several purposes so am always very careful with it. After snapping it then I write it down in my diary book and check very very carefully before I delete it from the phone though what I normally do most times is to rephrase the whole words in case someone incidentally gets access to my diary book and sees it so that's the safe way I normally do in other to protect my seeds.

I have several issues with this procedure and this is why:

• Taking a picture with a mobile phone likely exposes the picture to some cloud storage, like Google Photos, Apple iCloud, any app on your phone that fiddles with your picture gallery on your phone. Are you 100% sure your picture is only local on your phone? I doubt you can. If your mnemonic recovery words land in a cloud: how can you be sure, no human or robot can mess with them (OCR is a thing; picture cloud storage offers various fancy stuff to extract text from pictures, that's no rocket science).
• Rephrasing the words could be a good recipe for later problems and loss. It highly depends if you're able to remember to revert the rephrasing. People are different, but human memory is in most cases not very persistant, unless you regularly train, memorize, verify it thoroughly! For verification you likely need a physical backup you can 100% rely on. The latter makes memorising somewhat obsolete.

I can't imagine how you can paraphrase 12, or even 24 words, and carry it all in your head. Probably, this person should have a phenomenal memory and confidence that nothing will ever happen to him. Although, can we know what awaits us even in an hour?
How often do we meet people who invent ways to store their seed phrases that are so stupid, and they subsequently suffer from their inventions? Everything simple has already been invented a long time ago; there is no need to go crazy.

Would be almost my words, except that without medical issues, I'd say with proper method anybody can memorize 12 or even 24 mnemonic recovery words. You would have to train your memory regularly and verify your memory also regularly. For reliable verification you would need a proper physical backup. This physical backup on the other hand makes memorization in human brain rather obsolete.

If you only rely on your human brain as storage: this is a recipe for later desaster and loss of your wallet. Don't do this.

(of course running offline, air-gapped, running a Live Linux DVD from RAM, with the curtains closed on a computer that I'll burn in holy fire afterwards)

You are taking the definition of extreme paranoia to a completely different level.  Not that I do not like it though, the more precaution the fewer the worries.

Obviously I don't have holy fire, but indeed, peace of mind is the main point.

I read the "holy fire" as a joke and I liked it. The important message is that no traces should be left on that computer on which you fiddle around with unprotected mnemonic recovery words or private keys. Running a Live Linux solely in RAM which stays offline should be enough. At the end of your session when you shut down or turn off the computer is kind of a virtual holy fire for the bits in RAM.

[LoyceV]

I read the "holy fire" as a joke and I liked it. The important message is that no traces should be left on that computer on which you fiddle around with unprotected mnemonic recovery words or private keys. Running a Live Linux solely in RAM which stays offline should be enough. At the end of your session when you shut down or turn off the computer is kind of a virtual holy fire for the bits in RAM.

On a more serious note: I'd never use a wireless keyboard to enter any password or seed phrase!

[examplens]

This isn't even enough: you should check if the seed creates the same address again.

Why though?

I would never even try to copy an Address from a Seed that I have not backed up properly.  To me the verification part of my paper is part of a proper backup.  No point in writing down a Seed that may be wrong by a human mistake.

LoyceV is right here, ^{don't ask me how I know}, you can write the correct seed, but you can also make a mistake in writing down the address. I had a similar mistake, luckily it didn't cost me, but since then I've been making a seed&addy backup image, and I delete it only after checking, usually on another browser or even another computer.

[Kelward]

Check your Seed twice.  Do not be lazy.

Thanks for this reminder, someone might not fully understand the gravity of what you're saying until they perhaps experience the ugly feeling of helplessness in a simple mistake of misspell or not arranging in the right order. I've had an experience with a coinomi wallet, I was trying to restore the seed phrase and it kept telling me about misspell error, and there is nothing I can do about it till this day and the Bitcoin in it is probably lost for ever. So I painfully understand what it means to double or three times crosscheck seed phrase to avoid not accessing your wallet, in the case of compromise, loses, or theft of phone.

[Cricktor]

...

Coinomi uses standard BIP39 mnemonic recovery words. The wordlist is fixed, so misspelling a word should be not so difficult to spot. There shouldn't be many alternative similar words.

If the order of the words is wrong then always also the BIP39 checksum will be wrong. Checksum will also be wrong if just one word is exchanged for a very similar one. But if all words are correct but just their order is wrong AND it's a 12 words mnemonic backup, then finding the correct order of words is computationally doable, even if you don't have hefty cracking gear.

If you write down mnemonic recovery words, attach the sequence number of every word to it on your physical backup, so you can't mess up with row and column order. Write down date and reason of creation of this wallet's backup. Write down the software used and best also the derivation path of the wallet. If you use more than the derivation path's default account, document the purpose of each account.

[Distinctin]

Not just twice, but you should do it a lot of times. Remember if you mistakenly write your seed phrase, even with just a single digit is missing, you will never access your own wallet. So it’s really a must to keep checking the correct spelling or order of your seed phrase so that the contents of your wallet will not be compromised. Otherwise, if you are just too confident that its already fine and you tend to be more lazy than being cautious, then you will also have to pay the price in the long run, that is losing all your coins or funds in your wallet.