diff --git a/src/core/pay.ts b/src/core/pay.ts
index 5cda844..2bfe033 100644
--- a/src/core/pay.ts
+++ b/src/core/pay.ts
@@ -220,6 +220,7 @@ export const pay = async (
     challengePeriodExtension: paymentProps.challengePeriodExtension,
     tokenAddress,
     amount,
+    buyer: walletUser,
   });
 
   const _arbitrator = addrs.common.arbitrator || ADDRESS_ZERO;
diff --git a/src/helpers/__tests__/validPayment.test.tsx b/src/helpers/__tests__/validPayment.test.tsx
index e3fcf67..5a55150 100644
--- a/src/helpers/__tests__/validPayment.test.tsx
+++ b/src/helpers/__tests__/validPayment.test.tsx
@@ -1,8 +1,9 @@
-import { IPaymentProps } from "../../typing";
+import { IValidateProps } from "../../typing";
 import { validateParameters } from "../validateParameters";
 
-const params: IPaymentProps = {
+const params: IValidateProps = {
   seller: "0x7bD733DBc10A1cD04e1e51cC89450941c928ee62",
+  buyer: "0x484Ee4Eb8CB165F4FBFd897f84283142C8f1fD3a",
   arbitrator: "0x7bD733DBc10A1cD04e1e51cC89450941c928ee62",
   marketplace: "0x7bD733DBc10A1cD04e1e51cC89450941c928ee62",
   amount: 1,
diff --git a/src/helpers/validateParameters.ts b/src/helpers/validateParameters.ts
index f5018c5..657c2a6 100644
--- a/src/helpers/validateParameters.ts
+++ b/src/helpers/validateParameters.ts
@@ -1,4 +1,4 @@
-import { IPaymentProps } from "../typing";
+import { IValidateProps } from "../typing";
 import { ETH_ADDRESS } from "./constants";
 import {
   validateAddress,
@@ -13,7 +13,7 @@ export interface AddressesToCheck {
   tokenAddress?: string;
 }
 
-export const validateParameters = async (data: IPaymentProps) => {
+export const validateParameters = async (data: IValidateProps) => {
   const {
     seller,
     arbitrator,
@@ -24,6 +24,7 @@ export const validateParameters = async (data: IPaymentProps) => {
     arbitratorFee,
     marketplaceFee,
     tokenAddress = ETH_ADDRESS,
+    buyer,
   } = data;
 
   const addrs: AddressToReturn = await validateEns({
@@ -38,6 +39,10 @@ export const validateParameters = async (data: IPaymentProps) => {
     throw new Error(e.message);
   }
 
+  if (buyer.toLowerCase() === seller.toLowerCase()) {
+    throw new Error("Buyer cannot be the same as the seller");
+  }
+
   if (amount <= 0) {
     throw new Error("Invalid amount");
   }
diff --git a/src/typing/index.ts b/src/typing/index.ts
index 1180edc..b49a628 100644
--- a/src/typing/index.ts
+++ b/src/typing/index.ts
@@ -45,6 +45,10 @@ export interface IPaymentProps {
   challengePeriodExtension?: number;
 }
 
+export interface IValidateProps extends IPaymentProps {
+  buyer: string;
+}
+
 export interface IPaymentPropsData extends IPaymentProps {
   ensAddresses?: IEnsAddresses;
 }
diff --git a/src/ui/render/pay.ts b/src/ui/render/pay.ts
index fcc35d7..c6b1e30 100644
--- a/src/ui/render/pay.ts
+++ b/src/ui/render/pay.ts
@@ -9,6 +9,7 @@ import {
 import { toast } from "ui/internal/notification/toast";
 import { renderModal } from "ui/internal/config/render";
 import { PayModal } from "ui/internal/modals";
+import { getWalletAccount } from "wallet";
 
 /**
  * Opens a payment modal, which summarizes the escrow parameters for the user (buyer) and displays a button to Pay.
@@ -122,7 +123,8 @@ export const pay = async (
   const data: IPaymentPropsData = paymentProps;
 
   try {
-    const addrs = await validateParameters(data);
+    const walletUser = await getWalletAccount();
+    const addrs = await validateParameters({ ...data, buyer: walletUser });
 
     Object.entries(addrs.common).forEach(([key, value]) => {
       paymentProps[key] = value;