diff --git a/src/contributors/__tests__/add.js b/src/contributors/__tests__/add.js
index 1860b0be..b5cbbdf2 100644
--- a/src/contributors/__tests__/add.js
+++ b/src/contributors/__tests__/add.js
@@ -26,6 +26,12 @@ function fixtures() {
         profile: 'www.profile.url',
         contributions: [{type: 'blog', url: 'www.blog.url/path'}, 'code'],
       },
+      {
+        name: 'Missing Login',
+        avatar_url: 'www.avatar.url',
+        profile: 'www.profile.url',
+        contributions: ['code'],
+      },
     ],
   }
   return {options}
@@ -71,8 +77,8 @@ test('add new contributor at the end of the list of contributors', () => {
 
   return addContributor(options, username, contributions, mockInfoFetcher).then(
     contributors => {
-      expect(contributors.length).toBe(3)
-      expect(contributors[2]).toEqual({
+      expect(contributors.length).toBe(options.contributors.length + 1)
+      expect(contributors[options.contributors.length]).toEqual({
         login: 'login3',
         name: 'Some name',
         avatar_url: 'www.avatar.url',
@@ -91,8 +97,8 @@ test('add new contributor at the end of the list of contributors with a url link
 
   return addContributor(options, username, contributions, mockInfoFetcher).then(
     contributors => {
-      expect(contributors.length).toBe(3)
-      expect(contributors[2]).toEqual({
+      expect(contributors.length).toBe(options.contributors.length + 1)
+      expect(contributors[options.contributors.length]).toEqual({
         login: 'login3',
         name: 'Some name',
         avatar_url: 'www.avatar.url',
@@ -133,7 +139,7 @@ test(`should update an existing contributor's contributions if a new type is add
   const contributions = ['bug']
   return addContributor(options, username, contributions, mockInfoFetcher).then(
     contributors => {
-      expect(contributors.length).toBe(2)
+      expect(contributors.length).toBe(options.contributors.length)
       expect(contributors[0]).toEqual({
         login: 'login1',
         name: 'Some name',
@@ -171,7 +177,7 @@ test(`should update an existing contributor's contributions if a new type is add
 
   return addContributor(options, username, contributions, mockInfoFetcher).then(
     contributors => {
-      expect(contributors.length).toBe(2)
+      expect(contributors.length).toBe(options.contributors.length)
       expect(contributors[0]).toEqual({
         login: 'login1',
         name: 'Some name',
diff --git a/src/contributors/add.js b/src/contributors/add.js
index 7f7555dd..63a44d76 100644
--- a/src/contributors/add.js
+++ b/src/contributors/add.js
@@ -27,7 +27,10 @@ function updateContributor(options, contributor, contributions) {
 
 function updateExistingContributor(options, username, contributions) {
   return options.contributors.map(contributor => {
-    if (username.toLowerCase() !== contributor.login.toLowerCase()) {
+    if (
+      !contributor.login ||
+      username.toLowerCase() !== contributor.login.toLowerCase()
+    ) {
       return contributor
     }
     return updateContributor(options, contributor, contributions)
@@ -51,7 +54,10 @@ module.exports = function addContributor(
 ) {
   // case insensitive find
   const exists = _.find(contributor => {
-    return contributor.login.toLowerCase() === username.toLowerCase()
+    return (
+      contributor.login &&
+      contributor.login.toLowerCase() === username.toLowerCase()
+    )
   }, options.contributors)
 
   if (exists) {
diff --git a/src/contributors/prompt.js b/src/contributors/prompt.js
index cf699765..232cc356 100644
--- a/src/contributors/prompt.js
+++ b/src/contributors/prompt.js
@@ -35,6 +35,7 @@ function getQuestions(options, username, contributions) {
         return options.contributors
           .filter(
             entry =>
+              entry.login &&
               entry.login.toLowerCase() === answers.username.toLowerCase(),
           )
           .reduce(
@@ -48,6 +49,7 @@ function getQuestions(options, username, contributions) {
         const previousContributions = options.contributors
           .filter(
             entry =>
+              entry.login &&
               entry.login.toLowerCase() === answers.username.toLowerCase(),
           )
           .reduce(
diff --git a/src/generate/__tests__/fixtures/contributors.json b/src/generate/__tests__/fixtures/contributors.json
index ca834fe7..7872bd3b 100644
--- a/src/generate/__tests__/fixtures/contributors.json
+++ b/src/generate/__tests__/fixtures/contributors.json
@@ -19,5 +19,15 @@
     "profile": "http://github.com/chrisinajar",
     "avatar_url": "https://avatars1.githubusercontent.com/u/1500684",
     "contributions": ["doc"]
+  },
+  "nologin": {
+    "name": "No Github Account",
+    "avatar_url": "https://avatars1.githubusercontent.com/u/1500684",
+    "contributions": ["translation"]
+  },
+  "nologin_badrole": {
+    "name": "Wildly Misconfigured",
+    "avatar_url": "https://avatars1.githubusercontent.com/u/1500684",
+    "contributions": ["plumbis"]
   }
 }
diff --git a/src/generate/__tests__/format-contribution-type.js b/src/generate/__tests__/format-contribution-type.js
index d3a14e0e..5b242d16 100644
--- a/src/generate/__tests__/format-contribution-type.js
+++ b/src/generate/__tests__/format-contribution-type.js
@@ -153,3 +153,13 @@ test('throw a helpful error on unknown type', () => {
     formatContributionType(options, contributor, 'docs'),
   ).toThrowError('Unknown contribution type docs for contributor kentcdodds')
 })
+
+test('throw a helpful error on unknown type and no login', () => {
+  const contributor = contributors.nologin_badrole
+  const {options} = fixtures()
+  expect(() =>
+    formatContributionType(options, contributor, 'docs'),
+  ).toThrowError(
+    'Unknown contribution type docs for contributor Wildly Misconfigured',
+  )
+})
diff --git a/src/generate/__tests__/format-contributor.js b/src/generate/__tests__/format-contributor.js
index 7bc0b750..8182ea2e 100644
--- a/src/generate/__tests__/format-contributor.js
+++ b/src/generate/__tests__/format-contributor.js
@@ -65,3 +65,13 @@ test('format contributor with pipes in their name', () => {
 
   expect(formatContributor(options, contributor)).toBe(expected)
 })
+
+test('format contributor with no github account', () => {
+  const contributor = contributors.nologin
+  const {options} = fixtures()
+
+  const expected =
+    '<img src="https://avatars1.githubusercontent.com/u/1500684" width="150px;"/><br /><sub><b>No Github Account</b></sub><br />[🌍](#translation "Translation")'
+
+  expect(formatContributor(options, contributor)).toBe(expected)
+})
diff --git a/src/generate/format-contribution-type.js b/src/generate/format-contribution-type.js
index 482c62f8..78843ea0 100644
--- a/src/generate/format-contribution-type.js
+++ b/src/generate/format-contribution-type.js
@@ -19,9 +19,8 @@ module.exports = function formatContribution(
 
   if (!type) {
     throw new Error(
-      `Unknown contribution type ${contribution} for contributor ${
-        contributor.login
-      }`,
+      `Unknown contribution type ${contribution} for contributor ${contributor.login ||
+        contributor.name}`,
     )
   }
 
@@ -32,7 +31,8 @@ module.exports = function formatContribution(
     options,
   }
 
-  let url = `#${contribution}-${contributor.login}`
+  let url = getUrl(contribution, contributor)
+
   if (contribution.url) {
     url = contribution.url
   } else if (type.link) {
@@ -41,3 +41,11 @@ module.exports = function formatContribution(
 
   return linkTemplate(_.assign({url}, templateData))
 }
+
+function getUrl(contribution, contributor) {
+  if (contributor.login) {
+    return `#${contribution}-${contributor.login}`
+  } else {
+    return `#${contribution}`
+  }
+}
diff --git a/src/generate/format-contributor.js b/src/generate/format-contributor.js
index b8e65672..2b67ca4d 100644
--- a/src/generate/format-contributor.js
+++ b/src/generate/format-contributor.js
@@ -7,6 +7,9 @@ const avatarTemplate = _.template(
 const avatarBlockTemplate = _.template(
   '[<%= avatar %><br /><sub><b><%= name %></b></sub>](<%= contributor.profile %>)',
 )
+const avatarBlockTemplateNoProfile = _.template(
+  '<%= avatar %><br /><sub><b><%= name %></b></sub>',
+)
 const contributorTemplate = _.template(
   '<%= avatarBlock %><br /><%= contributions %>',
 )
@@ -15,15 +18,20 @@ const defaultImageSize = 100
 
 function defaultTemplate(templateData) {
   const avatar = avatarTemplate(templateData)
-  const avatarBlock = avatarBlockTemplate(
-    _.assign(
-      {
-        name: escapeName(templateData.contributor.name),
-        avatar,
-      },
-      templateData,
-    ),
+  const avatarBlockTemplateData = _.assign(
+    {
+      name: escapeName(templateData.contributor.name),
+      avatar,
+    },
+    templateData,
   )
+  let avatarBlock = null
+
+  if (templateData.contributor.profile) {
+    avatarBlock = avatarBlockTemplate(avatarBlockTemplateData)
+  } else {
+    avatarBlock = avatarBlockTemplateNoProfile(avatarBlockTemplateData)
+  }
 
   return contributorTemplate(_.assign({avatarBlock}, templateData))
 }