diff --git a/.changelog/656.feature.md b/.changelog/656.feature.md
new file mode 100644
index 000000000..c616d0d81
--- /dev/null
+++ b/.changelog/656.feature.md
@@ -0,0 +1 @@
+Add check against sending menmonics to search
diff --git a/src/app/components/Search/index.tsx b/src/app/components/Search/index.tsx
index 765b6de0f..67f3ab625 100644
--- a/src/app/components/Search/index.tsx
+++ b/src/app/components/Search/index.tsx
@@ -19,6 +19,7 @@ import { SearchScope } from '../../../types/searchScope'
 import { textSearchMininumLength } from './search-utils'
 import Typography from '@mui/material/Typography'
 import { isValidBlockHeight } from '../../utils/helpers'
+import { isValidMnemonic } from '../../utils/helpers'
 
 export type SearchVariant = 'button' | 'icon' | 'expandable'
 
@@ -105,14 +106,21 @@ const SearchCmp: FC<SearchProps> = ({ scope, variant, disabled, onFocusChange: o
   const [isFocused, setIsFocused] = useState(false)
   const valueInSearchParams = useSearchParams()[0].get('q') ?? ''
 
-  const valueWithoutPrefix = value.trim()
+  const wordsOfPower = t('search.wordsOfPower')
+  const hasWordsOfPower = value.trim().toLowerCase().startsWith(wordsOfPower.toLowerCase())
+  const valueWithoutPrefix = hasWordsOfPower
+    ? value.trim().substring(wordsOfPower.length).trim()
+    : value.trim()
 
   const isTooShort =
     !!value && valueWithoutPrefix.length < textSearchMininumLength && !isValidBlockHeight(valueWithoutPrefix)
 
+  const hasPrivacyProblem = !hasWordsOfPower && isValidMnemonic(valueWithoutPrefix)
+
   useEffect(() => {
-    setValue(valueInSearchParams)
-  }, [valueInSearchParams])
+    setValue(hasWordsOfPower ? `${wordsOfPower} ${valueInSearchParams}` : valueInSearchParams)
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, [valueInSearchParams]) // We only want to update the value from code when the URL changes
 
   const onChange = (newValue: string) => {
     setValue(newValue)
@@ -146,7 +154,13 @@ const SearchCmp: FC<SearchProps> = ({ scope, variant, disabled, onFocusChange: o
   const searchButtonContent =
     variant !== 'button' ? <SearchIcon sx={{ color: COLORS.grayMediumLight }} /> : t('search.searchBtnText')
 
-  const hasError = isTooShort
+  const errorMessage = isTooShort
+    ? t('search.error.tooShort')
+    : hasPrivacyProblem
+    ? t('search.error.privacy', { appName: t('pageTitle'), wordsOfPower })
+    : undefined
+
+  const hasError = !!errorMessage
 
   return (
     <SearchForm
@@ -195,7 +209,7 @@ const SearchCmp: FC<SearchProps> = ({ scope, variant, disabled, onFocusChange: o
           value &&
           value !== valueInSearchParams && (
             <div>
-              {isTooShort && (
+              {hasError && (
                 <>
                   <Typography
                     component="span"
@@ -211,7 +225,7 @@ const SearchCmp: FC<SearchProps> = ({ scope, variant, disabled, onFocusChange: o
                   >
                     <ErrorIcon />
                     &nbsp;
-                    {t('search.error.tooShort')}
+                    {errorMessage}
                   </Typography>
                   <br />
                 </>
diff --git a/src/locales/en/translation.json b/src/locales/en/translation.json
index 4ce7a708d..a333afaf9 100644
--- a/src/locales/en/translation.json
+++ b/src/locales/en/translation.json
@@ -375,7 +375,8 @@
   "search": {
     "placeholder": "Address, Block, Contract, Txn Hash, Transaction ID, Token name, etc",
     "error": {
-      "tooShort": "Please enter either at least 3 characters or a number in order to perform a search."
+      "tooShort": "Please enter either at least 3 characters or a number in order to perform a search.",
+      "privacy": "It seems like you might accidentally entered a keyphrase for a wallet. Please note that your mnemonic is a secret key that should never be shared, even not with our {{ pagetitle }}.\nExecuting this search is highly unlikely to return any results. If you want to proceed nonetheless, please add “{{ wordsOfPower }}” in front of your search query to perform the search at your own risk."
     },
     "mobilePlaceholder": "Search Address, Block, Txn, Token, etc",
     "noResults": {
@@ -412,6 +413,7 @@
     },
     "searchBtnText": "Search",
     "searchSuggestions": "Not sure what to look for? Try out a search: <OptionalBreak><BlockLink><BlockIcon/> Block</BlockLink>, <TransactionLink><TransactionIcon/> Transaction</TransactionLink>, <AccountLink><AccountIcon/> Address</AccountLink>, <TokenLink><TokenIcon/> Token</TokenLink> </OptionalBreak>",
-    "sectionHeader": "Results on {{ scope }}"
+    "sectionHeader": "Results on {{ scope }}",
+    "wordsOfPower": "I COMMAND THEE TO SEARCH FOR"
   }
 }