diff --git a/backend/api/blueprints/leads.py b/backend/api/blueprints/leads.py
index 9516460..e83b101 100644
--- a/backend/api/blueprints/leads.py
+++ b/backend/api/blueprints/leads.py
@@ -1,4 +1,7 @@
+import re
 from flask import Blueprint, request
+from pydantic.class_validators import validator
+from pydantic.networks import EmailStr, HttpUrl
 
 import sqlalchemy.exc as sa_exc
 from sqlalchemy import text
@@ -6,7 +9,8 @@
 from ..auth import auth
 from ..db import db
 from ..pagination import parse_pagination_params
-
+from .users import get_user_by_username
+from pydantic import BaseModel, ValidationError
 
 leads_bp = Blueprint("leads", __name__)
 
@@ -361,6 +365,43 @@ def _create_new_lead(request, valid_data_sources=VALID_DATA_SOURCES):
             if not all(c.isalnum() or c.isspace() or c == "." or c == "&" or c == "'" for c in company_name):
                 return {"message": "company_name can only contain a-z, 0-9, ., &, ', whitespace"}, 400
 
+    # using pydantic model to check phone number, assigned, email and social media urls
+    class FieldTestModel(BaseModel):
+        phoneNum: str
+        assigned: str
+        email: EmailStr
+        socialLink: HttpUrl
+
+        @validator("phoneNum", allow_reuse=True)
+        def check_phoneNumber_format(cls, v):
+            regExs = (r"\(\w{3}\) \w{3}\-\w{4}", r"^\w{3}\-\w{4}$")
+            if not re.search(regExs[0], v):
+                return ValueError("not match")
+            return v
+
+        @validator("assigned", allow_reuse=True)
+        def check_assigned(cls, v):
+            user_response = get_user_by_username(v)
+            if not user_response:
+                raise ValueError(f"{v!r} is not a registered user")
+            return v
+
+    try:
+        phoneNum = str(body.get("phone")).strip()
+        assigned = body.get("assigned")
+        email = EmailStr(body.get("email"))
+        link = body.get("twitter")
+
+        testInstance = FieldTestModel(phoneNum=phoneNum, assigned=assigned, email=email, socialLink=link)
+
+        testInstance.socialLink = link
+        link = body.get("facebook")
+        testInstance.socialLink = link
+        link = body.get("instagram")
+        testInstance.socialLink = link
+    except ValidationError as err:
+        return {"message": "{error}".format(error=err.errors()[0])}
+
     # validate data source field
     data_source = body.get("data_source")
     if data_source:
diff --git a/backend/requirements-prod.txt b/backend/requirements-prod.txt
index 1183caa..ebe6b65 100644
--- a/backend/requirements-prod.txt
+++ b/backend/requirements-prod.txt
@@ -5,6 +5,7 @@ chardet==4.0.0
 click==7.1.2
 cryptography==3.4.7
 ecdsa==0.17.0
+email-validator
 flasgger==0.9.5
 Flask==1.1.2
 Flask-Cors==3.0.10
@@ -14,12 +15,14 @@ gunicorn==20.1.0
 idna==2.10
 itsdangerous==2.0.1
 Jinja2==3.0.1
+marshmallow==3.14.0
 Mako==1.1.4
 MarkupSafe==2.0.1
 passlib==1.7.4
 psycopg2-binary==2.8.6
 pyasn1==0.4.8
 pycparser==2.20
+pydantic==1.8.2
 python-dateutil==2.8.1
 python-editor==1.0.4
 python-jose==3.3.0
diff --git a/backend/requirements.txt b/backend/requirements.txt
index 8fc978e..e1d0291 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1,12 +1,17 @@
 alembic==1.6.0
 appdirs==1.4.4
+attrs==21.2.0
+autopep8==1.5.7
 black==21.6b0
 certifi==2020.12.5
 cffi==1.14.5
 chardet==4.0.0
+charset-normalizer==2.0.7
 click==7.1.2
+colorama==0.4.4
 cryptography==3.4.7
 ecdsa==0.17.0
+email-validator==1.1.3
 flake8==3.9.2
 flasgger==0.9.5
 Flask==1.1.2
@@ -17,9 +22,11 @@ gunicorn==20.1.0
 idna==2.10
 itsdangerous==2.0.1
 Jinja2==3.0.1
+jsonschema==4.1.0
 Mako==1.1.4
 MarkupSafe==2.0.1
 mccabe==0.6.1
+mistune==0.8.4
 mypy-extensions==0.4.3
 passlib==1.7.4
 pathspec==0.8.1
@@ -27,17 +34,21 @@ psycopg2-binary==2.8.6
 pyasn1==0.4.8
 pycodestyle==2.7.0
 pycparser==2.20
+pydantic==1.8.2
 pyflakes==2.3.1
+pyrsistent==0.18.0
 python-dateutil==2.8.1
 python-editor==1.0.4
 python-jose==3.3.0
 pytz==2021.1
 PyYAML==5.4.1
 regex==2021.7.6
-requests==2.25.1
+requests==2.26.0
 rsa==4.7.2
 six==1.16.0
 SQLAlchemy==1.4.13
 toml==0.10.2
+typing-extensions==3.10.0.2
 urllib3==1.26.5
 Werkzeug==2.0.1
+yattag==1.14.0