diff --git a/occupi-backend/pkg/database/database.go b/occupi-backend/pkg/database/database.go
index 3c48ecd1..b99730cb 100644
--- a/occupi-backend/pkg/database/database.go
+++ b/occupi-backend/pkg/database/database.go
@@ -128,10 +128,11 @@ func ConfirmCheckIn(ctx *gin.Context, db *mongo.Client, checkIn models.CheckIn)
 	// Save the check-in to the database
 	collection := db.Database("Occupi").Collection("RoomBooking")
 
-	// Find the booking by bookingId, roomId, and check if the email is in the emails object
+	// Find the booking by bookingId, roomId, and creator
 	filter := bson.M{
-		"_id":    checkIn.BookingID,
-		"roomId": checkIn.RoomID,
+		"_id":     checkIn.BookingID,
+		"roomId":  checkIn.RoomID,
+		"creator": checkIn.Creator,
 	}
 
 	// Find the booking
@@ -145,15 +146,6 @@ func ConfirmCheckIn(ctx *gin.Context, db *mongo.Client, checkIn models.CheckIn)
 		logrus.Error("Failed to find booking:", err)
 		return false, err
 	}
-	emailToCheck := checkIn.Email
-	for _, email := range booking.Emails {
-		if email == emailToCheck {
-			break
-		}
-		// If we finish the loop without finding the email
-		logrus.Error("Email not associated with the room")
-		return false, errors.New("email not associated with the room")
-	}
 
 	update := bson.M{
 		"$set": bson.M{"checkedIn": true},
diff --git a/occupi-backend/pkg/handlers/api_handlers.go b/occupi-backend/pkg/handlers/api_handlers.go
index c6b60493..9d687be7 100644
--- a/occupi-backend/pkg/handlers/api_handlers.go
+++ b/occupi-backend/pkg/handlers/api_handlers.go
@@ -8,6 +8,7 @@ import (
 	"github.com/COS301-SE-2024/occupi/occupi-backend/pkg/constants"
 	"github.com/COS301-SE-2024/occupi/occupi-backend/pkg/database"
 	"github.com/COS301-SE-2024/occupi/occupi-backend/pkg/models"
+	"github.com/go-playground/validator/v10"
 	"go.mongodb.org/mongo-driver/bson/primitive"
 
 	"github.com/COS301-SE-2024/occupi/occupi-backend/pkg/mail"
@@ -53,13 +54,24 @@ func FetchResourceAuth(ctx *gin.Context, appsession *models.AppSession) {
 func BookRoom(ctx *gin.Context, appsession *models.AppSession) {
 	// consider structuring api responses to match that as outlined in our coding standards documentation
 	//link: https://cos301-se-2024.github.io/occupi/coding-standards/go-coding-standards#response-and-error-handling
-
 	var booking models.Booking
 	if err := ctx.ShouldBindJSON(&booking); err != nil {
 		ctx.JSON(http.StatusBadRequest, utils.ErrorResponse(http.StatusBadRequest, "Invalid request payload", constants.InvalidRequestPayloadCode, "Expected RoomID,Slot,Emails[],Creator,FloorNo ", nil))
 		return
 	}
-
+	// Initialize the validator
+	validate := validator.New()
+
+	// Validate the booking struct
+	if err := validate.Struct(booking); err != nil {
+		validationErrors := err.(validator.ValidationErrors)
+		errorDetails := make(gin.H)
+		for _, validationError := range validationErrors {
+			errorDetails[validationError.Field()] = validationError.Tag()
+		}
+		ctx.JSON(http.StatusBadRequest, utils.ErrorResponse(http.StatusBadRequest, "Validation failed", constants.InvalidRequestPayloadCode, "Validation errors occurred", errorDetails))
+		return
+	}
 	// Generate a unique ID for the booking
 	booking.ID = primitive.NewObjectID().Hex()
 	booking.OccupiID = utils.GenerateBookingID()
@@ -148,7 +160,7 @@ func CheckIn(ctx *gin.Context, appsession *models.AppSession) {
 	var checkIn models.CheckIn
 
 	if err := ctx.ShouldBindJSON(&checkIn); err != nil {
-		ctx.JSON(http.StatusBadRequest, utils.ErrorResponse(http.StatusBadRequest, "Invalid request payload", constants.InvalidRequestPayloadCode, "Expected Booking ID, Room ID, and Email Address", nil))
+		ctx.JSON(http.StatusBadRequest, utils.ErrorResponse(http.StatusBadRequest, "Invalid request payload", constants.InvalidRequestPayloadCode, "Expected Booking ID, Room ID, and Creator Email Address", nil))
 		return
 	}
 
diff --git a/occupi-backend/pkg/models/database.go b/occupi-backend/pkg/models/database.go
index 0f028712..58803367 100644
--- a/occupi-backend/pkg/models/database.go
+++ b/occupi-backend/pkg/models/database.go
@@ -18,13 +18,13 @@ type User struct {
 type Booking struct {
 	ID        string    `json:"_id" bson:"_id,omitempty"`
 	OccupiID  string    `json:"occupiId" bson:"occupiId,omitempty"`
-	RoomID    string    `json:"roomId" bson:"roomId"`
-	RoomName  string    `json:"roomName" bson:"roomName,omitempty"`
-	Slot      int       `json:"slot" bson:"slot"`
-	Emails    []string  `json:"emails" bson:"emails"`
-	CheckedIn bool      `json:"checkedIn" bson:"checkedIn,omitempty"`
-	Creator   string    `json:"creator" bson:"creator"`
-	FloorNo   int       `json:"floorNo" bson:"floorNo"`
+	RoomID    string    `json:"roomId" bson:"roomId" validate:"required"`
+	RoomName  string    `json:"roomName" bson:"roomName" validate:"required"`
+	Slot      int       `json:"slot" bson:"slot" validate:"required,min=1"`
+	Emails    []string  `json:"emails" bson:"emails" validate:"required,dive,email"`
+	CheckedIn bool      `json:"checkedIn" bson:"checkedIn"`
+	Creator   string    `json:"creator" bson:"creator" validate:"required,email"`
+	FloorNo   int       `json:"floorNo" bson:"floorNo" validate:"required"`
 	Date      time.Time `json:"date" bson:"date,omitempty"`
 	Start     time.Time `json:"start" bson:"start,omitempty"`
 	End       time.Time `json:"end" bson:"end,omitempty"`
@@ -33,7 +33,7 @@ type Booking struct {
 // structure of CheckIn
 type CheckIn struct {
 	BookingID string `json:"bookingId" bson:"bookingId"`
-	Email     string `json:"email" bson:"email"`
+	Creator   string `json:"creator" bson:"creator"`
 	RoomID    string `json:"roomId" bson:"roomId"`
 }