diff --git a/BTCPayServer.Tests/BTCPayServerTester.cs b/BTCPayServer.Tests/BTCPayServerTester.cs
index 956defe20..da6ad0016 100644
--- a/BTCPayServer.Tests/BTCPayServerTester.cs
+++ b/BTCPayServer.Tests/BTCPayServerTester.cs
@@ -122,7 +122,7 @@ namespace BTCPayServer.Tests
             ServerUri = new Uri("http://" + HostName + ":" + Port + "/");
 
             Environment.SetEnvironmentVariable("ASPNETCORE_ENVIRONMENT", "Development");
-            var conf = new DefaultConfiguration() { Logger = Logs.LogProvider.CreateLogger("Console") }.CreateConfiguration(new[] { "--datadir", _Directory, "--conf", confPath });
+            var conf = new DefaultConfiguration() { Logger = Logs.LogProvider.CreateLogger("Console") }.CreateConfiguration(new[] { "--datadir", _Directory, "--conf", confPath, "--disable-registration", "false" });
             _Host = new WebHostBuilder()
                     .UseConfiguration(conf)
                     .ConfigureServices(s =>
diff --git a/BTCPayServer.Tests/UnitTest1.cs b/BTCPayServer.Tests/UnitTest1.cs
index 4667e8ce4..ee4060414 100644
--- a/BTCPayServer.Tests/UnitTest1.cs
+++ b/BTCPayServer.Tests/UnitTest1.cs
@@ -101,7 +101,7 @@ namespace BTCPayServer.Tests
                 Rate = 10513.44m,
             }.SetPaymentMethodDetails(new BTCPayServer.Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod()
             {
-                NetworkFee = Money.Coins(0.00000100m),
+                NextNetworkFee = Money.Coins(0.00000100m),
                 DepositAddress = dummy
             }));
             paymentMethods.Add(new PaymentMethod()
@@ -110,7 +110,7 @@ namespace BTCPayServer.Tests
                 Rate = 216.79m
             }.SetPaymentMethodDetails(new BTCPayServer.Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod()
             {
-                NetworkFee = Money.Coins(0.00010000m),
+                NextNetworkFee = Money.Coins(0.00010000m),
                 DepositAddress = dummy
             }));
             invoiceEntity.SetPaymentMethods(paymentMethods);
@@ -150,7 +150,7 @@ namespace BTCPayServer.Tests
             var entity = new InvoiceEntity();
 #pragma warning disable CS0618
             entity.Payments = new System.Collections.Generic.List<PaymentEntity>();
-            entity.SetPaymentMethod(new PaymentMethod() { CryptoCode = "BTC", Rate = 5000, NetworkFee = Money.Coins(0.1m) });
+            entity.SetPaymentMethod(new PaymentMethod() { CryptoCode = "BTC", Rate = 5000, NextNetworkFee = Money.Coins(0.1m) });
             entity.ProductInformation = new ProductInformation() { Price = 5000 };
 
             var paymentMethod = entity.GetPaymentMethods(null).TryGet("BTC", PaymentTypes.BTCLike);
@@ -190,13 +190,13 @@ namespace BTCPayServer.Tests
             {
                 CryptoCode = "BTC",
                 Rate = 1000,
-                NetworkFee = Money.Coins(0.1m)
+                NextNetworkFee = Money.Coins(0.1m)
             });
             paymentMethods.Add(new PaymentMethod()
             {
                 CryptoCode = "LTC",
                 Rate = 500,
-                NetworkFee = Money.Coins(0.01m)
+                NextNetworkFee = Money.Coins(0.01m)
             });
             entity.SetPaymentMethods(paymentMethods);
             entity.Payments = new List<PaymentEntity>();
@@ -275,7 +275,7 @@ namespace BTCPayServer.Tests
             var entity = new InvoiceEntity();
 #pragma warning disable CS0618
             entity.Payments = new List<PaymentEntity>();
-            entity.SetPaymentMethod(new PaymentMethod() { CryptoCode = "BTC", Rate = 5000, NetworkFee = Money.Coins(0.1m) });
+            entity.SetPaymentMethod(new PaymentMethod() { CryptoCode = "BTC", Rate = 5000, NextNetworkFee = Money.Coins(0.1m) });
             entity.ProductInformation = new ProductInformation() { Price = 5000 };
             entity.PaymentTolerance = 0;
 
diff --git a/BTCPayServer/Configuration/BTCPayServerOptions.cs b/BTCPayServer/Configuration/BTCPayServerOptions.cs
index d657f6944..b40470f40 100644
--- a/BTCPayServer/Configuration/BTCPayServerOptions.cs
+++ b/BTCPayServer/Configuration/BTCPayServerOptions.cs
@@ -61,6 +61,12 @@ namespace BTCPayServer.Configuration
             set;
         } = new List<NBXplorerConnectionSetting>();
 
+        public bool DisableRegistration
+        {
+            get;
+            private set;
+        }
+
         public static string GetDebugLog(IConfiguration configuration)
         {
             return configuration.GetValue<string>("debuglog", null);
@@ -237,6 +243,8 @@ namespace BTCPayServer.Configuration
                 Logs.Configuration.LogInformation("LogFile: " + LogFile);
                 Logs.Configuration.LogInformation("Log Level: " + GetDebugLogLevel(conf));
             }
+
+            DisableRegistration = conf.GetOrDefault<bool>("disable-registration", true);
         }
 
         private SSHSettings ParseSSHConfiguration(IConfiguration conf)
diff --git a/BTCPayServer/Configuration/DefaultConfiguration.cs b/BTCPayServer/Configuration/DefaultConfiguration.cs
index 6717312d7..e89705953 100644
--- a/BTCPayServer/Configuration/DefaultConfiguration.cs
+++ b/BTCPayServer/Configuration/DefaultConfiguration.cs
@@ -43,6 +43,7 @@ namespace BTCPayServer.Configuration
             app.Option("--sshtrustedfingerprints", "SSH Host public key fingerprint or sha256 (default: empty, it will allow untrusted connections)", CommandOptionType.SingleValue);
             app.Option("--debuglog", "A rolling log file for debug messages.", CommandOptionType.SingleValue);
             app.Option("--debugloglevel", "The severity you log (default:information)", CommandOptionType.SingleValue);
+            app.Option("--disable-registration", "Disables new user registrations (default:true)", CommandOptionType.SingleValue);
             foreach (var network in provider.GetAll())
             {
                 var crypto = network.CryptoCode.ToLowerInvariant();
diff --git a/BTCPayServer/Controllers/AccountController.cs b/BTCPayServer/Controllers/AccountController.cs
index fa486a2a2..39e083e35 100644
--- a/BTCPayServer/Controllers/AccountController.cs
+++ b/BTCPayServer/Controllers/AccountController.cs
@@ -32,6 +32,7 @@ namespace BTCPayServer.Controllers
         StoreRepository storeRepository;
         RoleManager<IdentityRole> _RoleManager;
         SettingsRepository _SettingsRepository;
+        Configuration.BTCPayServerOptions _Options;
         ILogger _logger;
 
         public AccountController(
@@ -40,7 +41,8 @@ namespace BTCPayServer.Controllers
             StoreRepository storeRepository,
             SignInManager<ApplicationUser> signInManager,
             IEmailSender emailSender,
-            SettingsRepository settingsRepository)
+            SettingsRepository settingsRepository,
+            Configuration.BTCPayServerOptions options)
         {
             this.storeRepository = storeRepository;
             _userManager = userManager;
@@ -48,6 +50,7 @@ namespace BTCPayServer.Controllers
             _emailSender = emailSender;
             _RoleManager = roleManager;
             _SettingsRepository = settingsRepository;
+            _Options = options;
             _logger = Logs.PayServer;
         }
 
@@ -271,6 +274,13 @@ namespace BTCPayServer.Controllers
                     {
                         await _RoleManager.CreateAsync(new IdentityRole(Roles.ServerAdmin));
                         await _userManager.AddToRoleAsync(user, Roles.ServerAdmin);
+
+                        if(_Options.DisableRegistration)
+                        {
+                            // Once the admin user has been created lock subsequent user registrations (needs to be disabled for unit tests that require multiple users).
+                            policies.LockSubscription = true;
+                            await _SettingsRepository.UpdateSetting(policies);
+                        }
                     }
 
                     var code = await _userManager.GenerateEmailConfirmationTokenAsync(user);
diff --git a/BTCPayServer/Controllers/InvoiceController.UI.cs b/BTCPayServer/Controllers/InvoiceController.UI.cs
index 1e27b9ab4..a0238c6e0 100644
--- a/BTCPayServer/Controllers/InvoiceController.UI.cs
+++ b/BTCPayServer/Controllers/InvoiceController.UI.cs
@@ -304,7 +304,7 @@ namespace BTCPayServer.Controllers
 #pragma warning disable CS0618 // Type or member is obsolete
                 Status = invoice.StatusString,
 #pragma warning restore CS0618 // Type or member is obsolete
-                NetworkFee = paymentMethodDetails.GetNetworkFee(),
+                NetworkFee = paymentMethodDetails.GetNextNetworkFee(),
                 IsMultiCurrency = invoice.GetPayments().Select(p => p.GetPaymentMethodId()).Concat(new[] { paymentMethod.GetId() }).Distinct().Count() > 1,
                 ChangellyEnabled = changelly != null,
                 ChangellyMerchantId = changelly?.ChangellyMerchantId,
diff --git a/BTCPayServer/Controllers/InvoiceController.cs b/BTCPayServer/Controllers/InvoiceController.cs
index 47c46a615..eda115aa2 100644
--- a/BTCPayServer/Controllers/InvoiceController.cs
+++ b/BTCPayServer/Controllers/InvoiceController.cs
@@ -240,7 +240,7 @@ namespace BTCPayServer.Controllers
 #pragma warning disable CS0618
                 if (paymentMethod.GetId().IsBTCOnChain)
                 {
-                    entity.TxFee = paymentMethod.NetworkFee;
+                    entity.TxFee = paymentMethod.NextNetworkFee;
                     entity.Rate = paymentMethod.Rate;
                     entity.DepositAddress = paymentMethod.DepositAddress;
                 }
diff --git a/BTCPayServer/Payments/Bitcoin/BitcoinLikeOnChainPaymentMethod.cs b/BTCPayServer/Payments/Bitcoin/BitcoinLikeOnChainPaymentMethod.cs
index 4cc0d91af..30e25801c 100644
--- a/BTCPayServer/Payments/Bitcoin/BitcoinLikeOnChainPaymentMethod.cs
+++ b/BTCPayServer/Payments/Bitcoin/BitcoinLikeOnChainPaymentMethod.cs
@@ -20,9 +20,9 @@ namespace BTCPayServer.Payments.Bitcoin
             return DepositAddress;
         }
 
-        public decimal GetNetworkFee()
+        public decimal GetNextNetworkFee()
         {
-            return NetworkFee.ToDecimal(MoneyUnit.BTC);
+            return NextNetworkFee.ToDecimal(MoneyUnit.BTC);
         }
         public void SetPaymentDestination(string newPaymentDestination)
         {
@@ -34,7 +34,7 @@ namespace BTCPayServer.Payments.Bitcoin
         [JsonIgnore]
         public FeeRate FeeRate { get; set; }
         [JsonIgnore]
-        public Money NetworkFee { get; set; }
+        public Money NextNetworkFee { get; set; }
         [JsonIgnore]
         public String DepositAddress { get; set; }
         public BitcoinAddress GetDepositAddress(Network network)
diff --git a/BTCPayServer/Payments/Bitcoin/BitcoinLikePaymentHandler.cs b/BTCPayServer/Payments/Bitcoin/BitcoinLikePaymentHandler.cs
index 758fdc5fa..e7a830b86 100644
--- a/BTCPayServer/Payments/Bitcoin/BitcoinLikePaymentHandler.cs
+++ b/BTCPayServer/Payments/Bitcoin/BitcoinLikePaymentHandler.cs
@@ -53,11 +53,11 @@ namespace BTCPayServer.Payments.Bitcoin
             switch (onchainMethod.NetworkFeeMode)
             {
                 case NetworkFeeMode.Always:
-                    onchainMethod.NetworkFee = onchainMethod.FeeRate.GetFee(100); // assume price for 100 bytes
+                    onchainMethod.NextNetworkFee = onchainMethod.FeeRate.GetFee(100); // assume price for 100 bytes
                     break;
                 case NetworkFeeMode.Never:
                 case NetworkFeeMode.MultiplePaymentsOnly:
-                    onchainMethod.NetworkFee = Money.Zero;
+                    onchainMethod.NextNetworkFee = Money.Zero;
                     break;
             }
             onchainMethod.DepositAddress = (await prepare.ReserveAddress).ToString();
diff --git a/BTCPayServer/Payments/IPaymentMethodDetails.cs b/BTCPayServer/Payments/IPaymentMethodDetails.cs
index b6d472b1e..eab9c8853 100644
--- a/BTCPayServer/Payments/IPaymentMethodDetails.cs
+++ b/BTCPayServer/Payments/IPaymentMethodDetails.cs
@@ -18,10 +18,10 @@ namespace BTCPayServer.Payments
         string GetPaymentDestination();
         PaymentTypes GetPaymentType();
         /// <summary>
-        /// Returns what a merchant would need to pay to cashout this payment
+        /// Returns fee that the merchant charge to the customer for the next payment
         /// </summary>
         /// <returns></returns>
-        decimal GetNetworkFee();
+        decimal GetNextNetworkFee();
         /// <summary>
         /// Change the payment destination (internal plumbing)
         /// </summary>
diff --git a/BTCPayServer/Payments/Lightning/LightningLikePaymentMethodDetails.cs b/BTCPayServer/Payments/Lightning/LightningLikePaymentMethodDetails.cs
index a396e5ca3..c8edcba93 100644
--- a/BTCPayServer/Payments/Lightning/LightningLikePaymentMethodDetails.cs
+++ b/BTCPayServer/Payments/Lightning/LightningLikePaymentMethodDetails.cs
@@ -22,7 +22,7 @@ namespace BTCPayServer.Payments.Lightning
             return PaymentTypes.LightningLike;
         }
 
-        public decimal GetNetworkFee()
+        public decimal GetNextNetworkFee()
         {
             return 0.0m;
         }
diff --git a/BTCPayServer/Services/Invoices/InvoiceEntity.cs b/BTCPayServer/Services/Invoices/InvoiceEntity.cs
index 54050bbc0..0bc8fa914 100644
--- a/BTCPayServer/Services/Invoices/InvoiceEntity.cs
+++ b/BTCPayServer/Services/Invoices/InvoiceEntity.cs
@@ -730,7 +730,7 @@ namespace BTCPayServer.Services.Invoices
                 {
                     FeeRate = FeeRate,
                     DepositAddress = string.IsNullOrEmpty(DepositAddress) ? null : DepositAddress,
-                    NetworkFee = NetworkFee
+                    NextNetworkFee = NextNetworkFee
                 };
             }
             else
@@ -738,7 +738,7 @@ namespace BTCPayServer.Services.Invoices
                 var details = PaymentMethodExtensions.DeserializePaymentMethodDetails(GetId(), PaymentMethodDetails);
                 if (details is Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod btcLike)
                 {
-                    btcLike.NetworkFee = NetworkFee;
+                    btcLike.NextNetworkFee = NextNetworkFee;
                     btcLike.DepositAddress = string.IsNullOrEmpty(DepositAddress) ? null : DepositAddress;
                     btcLike.FeeRate = FeeRate;
                 }
@@ -760,7 +760,7 @@ namespace BTCPayServer.Services.Invoices
 
             if (paymentMethod is Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod bitcoinPaymentMethod)
             {
-                NetworkFee = bitcoinPaymentMethod.NetworkFee;
+                NextNetworkFee = bitcoinPaymentMethod.NextNetworkFee;
                 FeeRate = bitcoinPaymentMethod.FeeRate;
                 DepositAddress = bitcoinPaymentMethod.DepositAddress;
             }
@@ -775,8 +775,8 @@ namespace BTCPayServer.Services.Invoices
         [Obsolete("Use ((BitcoinLikeOnChainPaymentMethod)GetPaymentMethod()).FeeRate")]
         public FeeRate FeeRate { get; set; }
         [JsonProperty(PropertyName = "txFee")]
-        [Obsolete("Use ((BitcoinLikeOnChainPaymentMethod)GetPaymentMethod()).TxFee")]
-        public Money NetworkFee { get; set; }
+        [Obsolete("Use ((BitcoinLikeOnChainPaymentMethod)GetPaymentMethod()).NextNetworkFee")]
+        public Money NextNetworkFee { get; set; }
         [JsonProperty(PropertyName = "depositAddress")]
         [Obsolete("Use ((BitcoinLikeOnChainPaymentMethod)GetPaymentMethod()).DepositAddress")]
         public string DepositAddress { get; set; }
@@ -841,7 +841,7 @@ namespace BTCPayServer.Services.Invoices
             var method = GetPaymentMethodDetails();
             if (method == null)
                 return 0.0m;
-            return method.GetNetworkFee();
+            return method.GetNextNetworkFee();
         }
     }
 
diff --git a/BTCPayServer/Services/Invoices/InvoiceRepository.cs b/BTCPayServer/Services/Invoices/InvoiceRepository.cs
index ba9f5bd19..314a90bfa 100644
--- a/BTCPayServer/Services/Invoices/InvoiceRepository.cs
+++ b/BTCPayServer/Services/Invoices/InvoiceRepository.cs
@@ -393,7 +393,7 @@ retry:
                         paymentMethods = entity.GetPaymentMethods(null);
                     var paymentMethodDetails = paymentMethods.TryGet(paymentEntity.GetPaymentMethodId())?.GetPaymentMethodDetails();
                     if (paymentMethodDetails != null) // == null should never happen, but we never know.
-                        paymentEntity.NetworkFee = paymentMethodDetails.GetNetworkFee();
+                        paymentEntity.NetworkFee = paymentMethodDetails.GetNextNetworkFee();
                 }
 
                 return paymentEntity;
@@ -582,15 +582,15 @@ retry:
 #pragma warning restore CS0618
                     ReceivedTime = date.UtcDateTime,
                     Accounted = accounted,
-                    NetworkFee = paymentMethodDetails.GetNetworkFee()
+                    NetworkFee = paymentMethodDetails.GetNextNetworkFee()
                 };
                 entity.SetCryptoPaymentData(paymentData);
 
                 if (paymentMethodDetails is Payments.Bitcoin.BitcoinLikeOnChainPaymentMethod bitcoinPaymentMethod &&
                     bitcoinPaymentMethod.NetworkFeeMode == NetworkFeeMode.MultiplePaymentsOnly &&
-                    bitcoinPaymentMethod.NetworkFee == Money.Zero)
+                    bitcoinPaymentMethod.NextNetworkFee == Money.Zero)
                 {
-                    bitcoinPaymentMethod.NetworkFee = bitcoinPaymentMethod.FeeRate.GetFee(100); // assume price for 100 bytes
+                    bitcoinPaymentMethod.NextNetworkFee = bitcoinPaymentMethod.FeeRate.GetFee(100); // assume price for 100 bytes
                     paymentMethod.SetPaymentMethodDetails(bitcoinPaymentMethod);
                     invoiceEntity.SetPaymentMethod(paymentMethod);
                     invoice.Blob = ToBytes(invoiceEntity, network.NBitcoinNetwork);