diff --git a/src/models/actions/CreateParticipant.ts b/src/models/actions/CreateParticipant.ts
index 1bc45ac..808d3c2 100644
--- a/src/models/actions/CreateParticipant.ts
+++ b/src/models/actions/CreateParticipant.ts
@@ -47,7 +47,7 @@ export abstract class CreateParticipant {
 
     /**
      * The new participant's address.
-     * Must be of type number (address id), createAddress (new address) or address (existing address)
+     * Must be of type number (address id).
      * Optional.
      */
     @IsInt()
diff --git a/src/models/actions/CreateRunner.ts b/src/models/actions/CreateRunner.ts
index f3611ce..2b9f128 100644
--- a/src/models/actions/CreateRunner.ts
+++ b/src/models/actions/CreateRunner.ts
@@ -10,8 +10,7 @@ import { CreateParticipant } from './CreateParticipant';
 export class CreateRunner extends CreateParticipant {
 
     /**
-     * The new runner's team's id.
-     * Either provide this or his organisation's id.
+     * The new runner's group's id.
      */
     @IsInt()
     group: number;
diff --git a/src/models/actions/CreateRunnerGroup.ts b/src/models/actions/CreateRunnerGroup.ts
index 76552ac..288baeb 100644
--- a/src/models/actions/CreateRunnerGroup.ts
+++ b/src/models/actions/CreateRunnerGroup.ts
@@ -20,16 +20,16 @@ export abstract class CreateRunnerGroup {
     contact?: number;
 
     /**
-     * Deals with the contact for groups this.
+     * Get's this group's contact from this.address.
      */
     public async getContact(): Promise<GroupContact> {
         if (this.contact === undefined) {
             return null;
         }
         if (!isNaN(this.contact)) {
-            let address = await getConnectionManager().get().getRepository(GroupContact).findOne({ id: this.contact });
-            if (!address) { throw new GroupContactNotFoundError; }
-            return address;
+            let contact = await getConnectionManager().get().getRepository(GroupContact).findOne({ id: this.contact });
+            if (!contact) { throw new GroupContactNotFoundError; }
+            return contact;
         }
 
         throw new GroupContactWrongTypeError;
diff --git a/src/models/actions/CreateRunnerOrganisation.ts b/src/models/actions/CreateRunnerOrganisation.ts
index 01c3732..46fc72e 100644
--- a/src/models/actions/CreateRunnerOrganisation.ts
+++ b/src/models/actions/CreateRunnerOrganisation.ts
@@ -8,7 +8,7 @@ import { CreateRunnerGroup } from './CreateRunnerGroup';
 export class CreateRunnerOrganisation extends CreateRunnerGroup {
     /**
      * The new organisation's address.
-     * Must be of type number (address id), createAddress (new address) or address (existing address)
+     * Must be of type number (address id).
      * Optional.
      */
     @IsInt()
@@ -16,7 +16,7 @@ export class CreateRunnerOrganisation extends CreateRunnerGroup {
     address?: number;
 
     /**
-     * Creates a Participant entity from this.
+     * Get's this org's address from this.address.
      */
     public async getAddress(): Promise<Address> {
         if (this.address === undefined) {
diff --git a/src/models/actions/CreateTrack.ts b/src/models/actions/CreateTrack.ts
index 42bf384..9994094 100644
--- a/src/models/actions/CreateTrack.ts
+++ b/src/models/actions/CreateTrack.ts
@@ -10,7 +10,7 @@ export class CreateTrack {
     name: string;
 
     /**
-     * The track's distance in meters (must be greater 0).
+     * The track's distance in meters (must be greater than 0).
      */
     @IsInt()
     @IsPositive()
diff --git a/src/models/actions/UpdateRunner.ts b/src/models/actions/UpdateRunner.ts
index 436b947..5ade74f 100644
--- a/src/models/actions/UpdateRunner.ts
+++ b/src/models/actions/UpdateRunner.ts
@@ -10,15 +10,13 @@ import { CreateParticipant } from './CreateParticipant';
 export class UpdateRunner extends CreateParticipant {
 
     /**
-     * The new runner's team's id.
-     * Either provide this or his organisation's id.
+     * The updated runner's id.
      */
     @IsInt()
     id: number;
 
     /**
-     * The new runner's team's id.
-     * Either provide this or his organisation's id.
+     * The updated runner's new team/org.
      */
     @IsObject()
     group: RunnerGroup;