diff --git a/src/main/java/com/cloudbees/hudson/plugins/folder/properties/AuthorizationMatrixProperty.java b/src/main/java/com/cloudbees/hudson/plugins/folder/properties/AuthorizationMatrixProperty.java
index 518ba662..b53108a0 100644
--- a/src/main/java/com/cloudbees/hudson/plugins/folder/properties/AuthorizationMatrixProperty.java
+++ b/src/main/java/com/cloudbees/hudson/plugins/folder/properties/AuthorizationMatrixProperty.java
@@ -60,6 +60,7 @@
 import org.kohsuke.stapler.QueryParameter;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.verb.GET;
+import org.kohsuke.stapler.verb.POST;
 
 import java.io.IOException;
 import java.util.Collections;
@@ -166,6 +167,7 @@ public boolean isApplicable(Class<? extends AbstractFolder> folder) {
         }
 
         @GET
+        @POST
         public FormValidation doCheckName(@AncestorInPath AbstractFolder<?> folder, @QueryParameter String value) {
             return doCheckName_(value, folder, Item.CONFIGURE);
         }
diff --git a/src/main/java/hudson/security/AuthorizationMatrixProperty.java b/src/main/java/hudson/security/AuthorizationMatrixProperty.java
index fc14284f..b7e671b2 100644
--- a/src/main/java/hudson/security/AuthorizationMatrixProperty.java
+++ b/src/main/java/hudson/security/AuthorizationMatrixProperty.java
@@ -72,6 +72,7 @@
 import org.kohsuke.stapler.QueryParameter;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.verb.GET;
+import org.kohsuke.stapler.verb.POST;
 
 /**
  * {@link JobProperty} to associate ACL for each project.
@@ -205,6 +206,7 @@ public boolean isApplicable(Class<? extends Job> jobType) {
         }
 
         @GET
+        @POST
         public FormValidation doCheckName(@AncestorInPath Job<?, ?> project, @QueryParameter String value) {
             return doCheckName_(value, project, Item.CONFIGURE);
         }
diff --git a/src/main/java/hudson/security/GlobalMatrixAuthorizationStrategy.java b/src/main/java/hudson/security/GlobalMatrixAuthorizationStrategy.java
index 39f16f72..c7971caf 100644
--- a/src/main/java/hudson/security/GlobalMatrixAuthorizationStrategy.java
+++ b/src/main/java/hudson/security/GlobalMatrixAuthorizationStrategy.java
@@ -44,6 +44,8 @@
 import org.kohsuke.accmod.restrictions.NoExternalUse;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.QueryParameter;
+import org.kohsuke.stapler.verb.GET;
+import org.kohsuke.stapler.verb.POST;
 
 import java.util.Arrays;
 import java.util.Collections;
@@ -218,6 +220,8 @@ protected GlobalMatrixAuthorizationStrategy create() {
         }
 
         @Restricted(NoExternalUse.class)
+        @GET
+        @POST
         public FormValidation doCheckName(@QueryParameter String value ) {
             return doCheckName_(value, Jenkins.get(), Jenkins.ADMINISTER);
         }
diff --git a/src/main/java/org/jenkinsci/plugins/matrixauth/AuthorizationContainerDescriptor.java b/src/main/java/org/jenkinsci/plugins/matrixauth/AuthorizationContainerDescriptor.java
index 58499778..4d62ea9a 100644
--- a/src/main/java/org/jenkinsci/plugins/matrixauth/AuthorizationContainerDescriptor.java
+++ b/src/main/java/org/jenkinsci/plugins/matrixauth/AuthorizationContainerDescriptor.java
@@ -13,6 +13,8 @@
 import org.kohsuke.accmod.Restricted;
 import org.kohsuke.accmod.restrictions.DoNotUse;
 import org.kohsuke.accmod.restrictions.NoExternalUse;
+import org.kohsuke.stapler.verb.GET;
+import org.kohsuke.stapler.verb.POST;
 
 import edu.umd.cs.findbugs.annotations.NonNull;
 
@@ -140,6 +142,8 @@ default String getTypeLabel(String type) throws NoSuchMethodException, Invocatio
 
     // Not used directly by Stapler due to the trailing _ (this prevented method confusion around 1.415).
     @Restricted(NoExternalUse.class)
+    @GET
+    @POST
     default FormValidation doCheckName_(@NonNull String value, @NonNull AccessControlled subject, @NonNull Permission permission) {
 
         final String unbracketedValue = value.substring(1, value.length() - 1); // remove leading [ and trailing ]
diff --git a/src/main/java/org/jenkinsci/plugins/matrixauth/AuthorizationMatrixNodeProperty.java b/src/main/java/org/jenkinsci/plugins/matrixauth/AuthorizationMatrixNodeProperty.java
index 8e81ad16..68bdc8dc 100644
--- a/src/main/java/org/jenkinsci/plugins/matrixauth/AuthorizationMatrixNodeProperty.java
+++ b/src/main/java/org/jenkinsci/plugins/matrixauth/AuthorizationMatrixNodeProperty.java
@@ -49,6 +49,8 @@
 import org.kohsuke.stapler.AncestorInPath;
 import org.kohsuke.stapler.QueryParameter;
 import org.kohsuke.stapler.StaplerRequest;
+import org.kohsuke.stapler.verb.GET;
+import org.kohsuke.stapler.verb.POST;
 
 import edu.umd.cs.findbugs.annotations.CheckForNull;
 import edu.umd.cs.findbugs.annotations.NonNull;
@@ -179,6 +181,8 @@ public String getDisplayName() {
         }
 
         @Restricted(DoNotUse.class)
+        @GET
+        @POST
         public FormValidation doCheckName(@AncestorInPath Computer computer, @QueryParameter String value) {
             // Computer isn't a DescriptorByNameOwner before Jenkins 2.78, and then @AncestorInPath doesn't work
             return doCheckName_(value,