diff --git a/Application/Handlers/CreatePlayOfferHandler.cs b/Application/Handlers/CreatePlayOfferHandler.cs
index b41fd73..bcd4688 100644
--- a/Application/Handlers/CreatePlayOfferHandler.cs
+++ b/Application/Handlers/CreatePlayOfferHandler.cs
@@ -25,6 +25,9 @@ public CreatePlayOfferHandler(WriteEventRepository writeEventRepository, ClubRep
     public async Task<Guid> Handle(CreatePlayOfferCommand request, CancellationToken cancellationToken)
     {
         var playOfferDto = request.CreatePlayOfferDto;
+        
+        if (playOfferDto.ProposedStartTime >= playOfferDto.ProposedEndTime)
+            throw new InvalidOperationException("Proposed start time must be before proposed end time!");
 
         var club = await _clubRepository.GetClubById(request.ClubId);
         if (club == null)
diff --git a/Application/Handlers/GetPlayOffersByClubIdHandler.cs b/Application/Handlers/GetPlayOffersByClubIdHandler.cs
index 3e78837..6ff7de4 100644
--- a/Application/Handlers/GetPlayOffersByClubIdHandler.cs
+++ b/Application/Handlers/GetPlayOffersByClubIdHandler.cs
@@ -24,8 +24,13 @@ public GetPlayOffersByClubIdHandler(PlayOfferRepository playOfferRepository, Mem
     public async Task<IEnumerable<PlayOfferDto>> Handle(GetPlayOffersByClubIdQuery request, CancellationToken cancellationToken)
     {
         var playOffers = await _playOfferRepository.GetPlayOffersByIds(null, null, request.ClubId);
+        var club = await _clubRepository.GetClubById(request.ClubId);
         
-        var clubDto = new ClubDto((await _clubRepository.GetClubById(request.ClubId))!);
+        var playOfferDtos = new List<PlayOfferDto>();
+        if (club == null)
+            return playOfferDtos;
+        
+        var clubDto = new ClubDto(club);
         var memberDtos = (await _memberRepository.GetAllMembers()).Select(member => new MemberDto(member)).ToList();
         var courtDtos = (await _courtRepository.GetAllCourts()).Select(court => new CourtDto(court)).ToList();
         var reservationDtos = (await _reservationRepository.GetAllReservations())
@@ -34,7 +39,7 @@ public async Task<IEnumerable<PlayOfferDto>> Handle(GetPlayOffersByClubIdQuery r
                 courtDtos.First(courtDto => courtDto.Id == reservation.CourtId)))
             .ToList();
         
-        var playOfferDtos = new List<PlayOfferDto>();
+        
         foreach (var playOffer in playOffers)
         {
             var creator = memberDtos.First(member => member.Id == playOffer.CreatorId);
diff --git a/Application/RedisPlayOfferStreamService.cs b/Application/RedisPlayOfferStreamService.cs
index f1b6d72..0846d6c 100644
--- a/Application/RedisPlayOfferStreamService.cs
+++ b/Application/RedisPlayOfferStreamService.cs
@@ -53,7 +53,7 @@ protected override async Task ExecuteAsync(CancellationToken stoppingToken)
                 var parsedEvent = ParseEvent(streamEntry);
                 await mediator.Send(parsedEvent, _cancellationToken);
             }
-            await Task.Delay(1000);
+            await Task.Delay(250);
         }
     }
     
diff --git a/Application/RedisReservationStreamService.cs b/Application/RedisReservationStreamService.cs
index 26655e0..f27f941 100644
--- a/Application/RedisReservationStreamService.cs
+++ b/Application/RedisReservationStreamService.cs
@@ -56,7 +56,7 @@ protected override async Task ExecuteAsync(CancellationToken stoppingToken)
 
                 await mediator.Send(parsedEvent, _cancellationToken);
             }
-            await Task.Delay(1000);
+            await Task.Delay(10000);
         }
     }
     
diff --git a/Domain/Events/Reservation/ReservationRejectedEvent.cs b/Domain/Events/Reservation/ReservationRejectedEvent.cs
index ad4bbb7..dbee749 100644
--- a/Domain/Events/Reservation/ReservationRejectedEvent.cs
+++ b/Domain/Events/Reservation/ReservationRejectedEvent.cs
@@ -6,17 +6,17 @@ namespace PlayOfferService.Domain.Events.Reservation;
 public class ReservationRejectedEvent : DomainEvent
 {
     [JsonPropertyName("start")]
-    public DateTime Start { get; set; }
+    public DateTime? Start { get; set; }
     [JsonPropertyName("end")]
-    public DateTime End { get; set; }
+    public DateTime? End { get; set; }
     [JsonPropertyName("reservantId")]
     public Guid? ReservantId { get; set; }
     [JsonPropertyName("tournamentId")]
     public Guid? TournamentId { get; set; }
     [JsonPropertyName("participantIds")]
     public List<Guid>? ParticipantIds { get; set; }
-    [JsonPropertyName("courtIds")]
-    public Guid CourtId { get; set; }
+    [JsonPropertyName("courtId")]
+    public Guid? CourtId { get; set; }
     
     public ReservationRejectedEvent(){}
 }
\ No newline at end of file
diff --git a/Domain/Models/DTOs/CreatePlayOfferDto.cs b/Domain/Models/DTOs/CreatePlayOfferDto.cs
index efa52c8..0bb3890 100644
--- a/Domain/Models/DTOs/CreatePlayOfferDto.cs
+++ b/Domain/Models/DTOs/CreatePlayOfferDto.cs
@@ -1,7 +1,11 @@
+using System.ComponentModel.DataAnnotations;
+
 namespace PlayOfferService.Domain.Models;
 
 public class CreatePlayOfferDto
 {
+    [Required]
     public DateTime ProposedStartTime { get; set; }
+    [Required]
     public DateTime ProposedEndTime { get; set; }
 }
\ No newline at end of file
diff --git a/Domain/Models/JoinPlayOfferDto.cs b/Domain/Models/JoinPlayOfferDto.cs
index 9d2ed93..23e462c 100644
--- a/Domain/Models/JoinPlayOfferDto.cs
+++ b/Domain/Models/JoinPlayOfferDto.cs
@@ -1,7 +1,11 @@
+using System.ComponentModel.DataAnnotations;
+
 namespace PlayOfferService.Domain.Models;
 
 public class JoinPlayOfferDto
 {
+    [Required]
     public Guid PlayOfferId { get; set; }
+    [Required]
     public DateTime AcceptedStartTime { get; set; }
 }
\ No newline at end of file