diff --git a/zero.Raven/Operations/RavenOperations.Write.cs b/zero.Raven/Operations/RavenOperations.Write.cs
index 78ebe4dd..c4e32afe 100644
--- a/zero.Raven/Operations/RavenOperations.Write.cs
+++ b/zero.Raven/Operations/RavenOperations.Write.cs
@@ -9,10 +9,10 @@ public partial class RavenOperations : IRavenOperations
   public virtual Task<Result<T>> Create<T>(T model, Func<T, Task<ValidationResult>> validate = null, Action<IZeroDocumentSession> onAfterStore = null) where T : ZeroIdEntity, new() => Save(model, validate, onAfterStore);
 
   /// <inheritdoc />
-  public virtual Task<Result<T>> Update<T>(T model, Func<T, Task<ValidationResult>> validate = null, Action<IZeroDocumentSession> onAfterStore = null) where T : ZeroIdEntity, new() => Save(model, validate, onAfterStore);
+  public virtual Task<Result<T>> Update<T>(T model, Func<T, Task<ValidationResult>> validate = null, Action<IZeroDocumentSession> onAfterStore = null) where T : ZeroIdEntity, new() => Save(model, validate, onAfterStore, true);
 
   /// <inheritdoc />
-  protected virtual async Task<Result<T>> Save<T>(T model, Func<T, Task<ValidationResult>> validate = null, Action<IZeroDocumentSession> onAfterStore = null) where T : ZeroIdEntity, new()
+  protected virtual async Task<Result<T>> Save<T>(T model, Func<T, Task<ValidationResult>> validate = null, Action<IZeroDocumentSession> onAfterStore = null, bool update = false) where T : ZeroIdEntity, new()
   {
     if (model == null)
     {
@@ -30,10 +30,14 @@ public partial class RavenOperations : IRavenOperations
         previousModel = await session.LoadAsync<T>(model.Id);
       }
 
-      if (previousModel == null)
+      if (update && previousModel == null)
       {
         return Result<T>.Fail("@errors.onsave.noidmatch");
       }
+      else if (!update && previousModel != null)
+      {
+        return Result<T>.Fail("@errors.oncreate.idmismatch");
+      }
 
       isUpdate = true;
     }
diff --git a/zero/Numbers/IZeroNumberStoreDbProvider.cs b/zero/Numbers/IZeroNumberStoreDbProvider.cs
new file mode 100644
index 00000000..b717e47f
--- /dev/null
+++ b/zero/Numbers/IZeroNumberStoreDbProvider.cs
@@ -0,0 +1,18 @@
+using System.Linq.Expressions;
+
+namespace zero.Numbers;
+
+public interface IZeroNumberStoreDbProvider
+{
+  Task<T> Load<T>(string id, CancellationToken ct = default) where T : ZeroEntity, new();
+
+  Task<T> Find<T>(Expression<Func<T, bool>> expression, CancellationToken ct = default) where T : ZeroEntity;
+  
+  Task<IList<T>> FindAll<T>(Expression<Func<T, bool>> expression, CancellationToken ct = default) where T : ZeroEntity;
+
+  Task<Result<T>> Create<T>(T model, CancellationToken ct = default) where T : ZeroEntity, new();
+  
+  Task<Result<T>> Update<T>(T model, CancellationToken ct = default) where T : ZeroEntity, new();
+  
+  Task<Result<T>> Delete<T>(T model, CancellationToken ct = default) where T : ZeroEntity, new();
+}
\ No newline at end of file
diff --git a/zero/Numbers/Number.cs b/zero/Numbers/Number.cs
new file mode 100644
index 00000000..f84c2837
--- /dev/null
+++ b/zero/Numbers/Number.cs
@@ -0,0 +1,47 @@
+namespace zero.Numbers;
+
+/// <summary>
+/// Configuration of number generation
+/// Template can use the following placeholders:
+/// {number} for the current number
+/// {random} for a random number (default length is 5)
+/// {random:7} for a random number with the specified length
+/// {year} for the date in yyyy
+/// {date} for the date in dd-mm-yyyy
+/// {date:dmy} for the date in a custom format, where dmy is a nested placeholder for the format
+/// </summary>
+public class Number : ZeroEntity
+{
+  /// <summary>
+  /// The template to build the number.
+  /// The number will reset to StartNumber once a new year is reached.
+  /// This is only applicable if the template contains the placeholder {year}.
+  /// Example: {year}-{number} will result in 2020-01, 2020-02, ... 2021-01, 2021-02, ...
+  /// </summary>
+  public string Template { get; set; } = "{number}";
+
+  /// <summary>
+  /// Where to start, lol
+  /// </summary>
+  public long StartNumber { get; set; } = 1;
+
+  /// <summary>
+  /// Minimum length of the number (append 0's when it is too short)
+  /// </summary>
+  public int MinLength { get; set; } = 1;
+
+  /// <summary>
+  /// Store current counters
+  /// </summary>
+  public List<NumberCounter> Counters { get; set; } = new();
+}
+
+
+public class NumberCounter
+{
+  public string Key { get; set; }
+
+  public string Value { get; set; }
+
+  public long Count { get; set; }
+}
\ No newline at end of file
diff --git a/zero/Numbers/NumberInterceptor.cs b/zero/Numbers/NumberInterceptor.cs
new file mode 100644
index 00000000..fa7ee314
--- /dev/null
+++ b/zero/Numbers/NumberInterceptor.cs
@@ -0,0 +1,42 @@
+using Raven.Client.Documents;
+
+namespace zero.Commerce.Numbers;
+
+public class NumberInterceptor : Interceptor<Number>
+{
+  protected IZeroStore Store { get; private set; }
+
+
+  public NumberInterceptor(IZeroStore store)
+  {
+    Store = store;
+  }
+
+
+  /// <inheritdoc />
+  public override Task<InterceptorResult<Number>> Creating(InterceptorParameters args, Number model) => Saving(args, model, false);
+
+  /// <inheritdoc />
+  public override Task<InterceptorResult<Number>> Updating(InterceptorParameters args, Number model) => Saving(args, model, true);
+
+
+  protected async Task<InterceptorResult<Number>> Saving(InterceptorParameters args, Number model, bool update)
+  {
+    string flavor = model.Flavor;
+    string existingId = await args.Operations.Session.Query<Number>().Where(x => x.Flavor == flavor).Select(x => x.Id).FirstOrDefaultAsync();
+
+    if (!existingId.IsNullOrEmpty() && existingId != model.Id)
+    {
+      return new()
+      {
+        Result = Result<Number>.Fail("@shop.errors.number.multiplenotallowed")
+      };
+    }
+
+    model.Alias = flavor;
+    model.IsActive = true;
+    model.Name = null;
+
+    return default;
+  }
+}
\ No newline at end of file
diff --git a/zero/Numbers/NumberOptions.cs b/zero/Numbers/NumberOptions.cs
new file mode 100644
index 00000000..ead86c64
--- /dev/null
+++ b/zero/Numbers/NumberOptions.cs
@@ -0,0 +1,17 @@
+namespace zero.Numbers;
+
+public class NumberOptions : List<NumberOptionsItem>
+{
+}
+
+
+public class NumberOptionsItem
+{
+  public string Alias { get; set; }
+
+  public string Template { get; set; } = "{number}";
+
+  public long StartNumber { get; set; } = 1;
+
+  public int MinLength { get; set; } = 1;
+}
diff --git a/zero/Numbers/NumberService.cs b/zero/Numbers/NumberService.cs
new file mode 100644
index 00000000..925f9f6a
--- /dev/null
+++ b/zero/Numbers/NumberService.cs
@@ -0,0 +1,45 @@
+using System.Text.RegularExpressions;
+using zero.Numbers;
+
+namespace zero.Numbers;
+
+public class NumberService : INumberService
+{
+  protected IZeroNumberStoreDbProvider Db { get; set; }
+
+  const string DEFAULT_COUNTER = "Default";
+  Regex templateRegex = new("{(date|number|year|random):?([a-zA-Z0-9-_]*)}", RegexOptions.IgnoreCase);
+  Regex containsYearRegex = new("{(date|year|date:([^}]*y+[^}]*))}", RegexOptions.IgnoreCase);
+  Random random = new();
+
+
+  public NumberService(IZeroNumberStoreDbProvider db, IZeroOptions options)
+  {
+    Db = db;
+    //RegisteredTypes = options.For<FlavorOptions>().GetAll<Number>().Select(x => x as NumberType);
+  }
+}
+
+
+public interface INumberService
+{
+  /// <summary>
+  /// Get the next available number for the specified template
+  /// </summary>
+  Task<string> Next(string alias, DateTimeOffset? date = null, bool store = true);
+
+  /// <summary>
+  /// Resets the current counter for the specified template
+  /// </summary>
+  Task Reset(string alias);
+
+  /// <summary>
+  /// Resets all counters for the specified template
+  /// </summary>
+  Task ResetAll(string alias);
+
+  /// <summary>
+  /// Renders the final output from the template and the value
+  /// </summary>
+  string Compile(string alias, long value, DateTimeOffset? date = null);
+}
\ No newline at end of file
diff --git a/zero/Numbers/NumberValidator.cs b/zero/Numbers/NumberValidator.cs
new file mode 100644
index 00000000..9553b9ff
--- /dev/null
+++ b/zero/Numbers/NumberValidator.cs
@@ -0,0 +1,19 @@
+using FluentValidation;
+
+namespace zero.Numbers;
+
+public class NumberValidator : ZeroValidator<Number>
+{
+  public NumberValidator()
+  {
+    //if (ctx.Context == null)
+    //{
+    //  throw new ArgumentNullException("ctx.Context", "NumberValidator requires access to ");
+    //}
+
+    RuleFor(x => x.Template).NotEmpty().Length(2, 60);
+    RuleFor(x => x.Template).Must(x => x != null && x.Contains("{number}")).WithMessage("@shop.number.errors.invalid_template");
+    RuleFor(x => x.StartNumber).GreaterThanOrEqualTo(0);
+    RuleFor(x => x.MinLength).ExclusiveBetween(1, 32);
+  }
+}
\ No newline at end of file
diff --git a/zero/Numbers/ZeroCommerceNumberModule.cs b/zero/Numbers/ZeroCommerceNumberModule.cs
new file mode 100644
index 00000000..9515fcb9
--- /dev/null
+++ b/zero/Numbers/ZeroCommerceNumberModule.cs
@@ -0,0 +1,24 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace zero.Commerce.Numbers;
+
+internal class ZeroCommerceNumberModule : ZeroModule
+{
+  public override void ConfigureServices(IServiceCollection services, IConfiguration configuration)
+  {
+    services.AddScoped<INumberStore, NumberStore>();
+    services.AddScoped<INumberService, NumberService>();
+    services.AddSingleton<IPermissionProvider, NumberPermissions>();
+    services.AddScoped<IInterceptor, NumberInterceptor>();
+    services.AddScoped<IValidator<Number>, NumberValidator>();
+
+    services.Configure<FlavorOptions>(opts =>
+    {
+      opts.Configure<Number>(cfg =>
+      {
+        cfg.CanUseWithoutFlavors = false;
+      });
+    });
+  }
+}
\ No newline at end of file
diff --git a/zero/Numbers/ZeroNumberModule.cs b/zero/Numbers/ZeroNumberModule.cs
new file mode 100644
index 00000000..54f9beb6
--- /dev/null
+++ b/zero/Numbers/ZeroNumberModule.cs
@@ -0,0 +1,12 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace zero.Numbers;
+
+internal class ZeroNumberModule : ZeroModule
+{
+  public override void ConfigureServices(IServiceCollection services, IConfiguration configuration)
+  {
+    services.AddOptions<NumberOptions>().Bind(configuration.GetSection("Zero:Numbers"));
+  }
+}
\ No newline at end of file
diff --git a/zero/Numbers/_NumberService.cs b/zero/Numbers/_NumberService.cs
new file mode 100644
index 00000000..5520d4ed
--- /dev/null
+++ b/zero/Numbers/_NumberService.cs
@@ -0,0 +1,379 @@
+using Raven.Client.Documents;
+using System.Text.RegularExpressions;
+
+namespace zero.Commerce.Numbers;
+
+public class _NumberService : I_NumberService
+{
+  /// <inheritdoc />
+  public IEnumerable<NumberType> RegisteredTypes { get; private set; }
+
+  protected INumberStore Store { get; set; }
+
+  const string DEFAULT_COUNTER = "Default";
+  Regex templateRegex = new("{(date|number|year|random):?([a-zA-Z0-9-_]*)}", RegexOptions.IgnoreCase);
+  Regex containsYearRegex = new("{(date|year|date:([^}]*y+[^}]*))}", RegexOptions.IgnoreCase);
+  Random random = new();
+
+
+  public _NumberService(INumberStore store, IZeroOptions options)
+  {
+    Store = store;
+    RegisteredTypes = options.For<FlavorOptions>().GetAll<Number>().Select(x => x as NumberType);
+  }
+
+
+  /// <inheritdoc />
+  public async Task<Number> Get(string alias)
+  {
+    NumberType type = RegisteredTypes.FirstOrDefault(x => x.Alias.Equals(alias, StringComparison.InvariantCultureIgnoreCase));
+    return await Load(type, () => type.Construct(type) as Number);
+  }
+
+
+  /// <inheritdoc />
+  public async Task<T> Get<T>(string alias = null) where T : Number, new()
+  {
+    NumberType type = RegisteredTypes.FirstOrDefault(x => x.FlavorType == typeof(T) && (alias.IsNullOrEmpty() || x.Alias.Equals(alias, StringComparison.InvariantCultureIgnoreCase)));
+    return await Load<T>(type);
+  }
+
+
+  /// <inheritdoc />
+  public async Task<Paged<NumberCounter>> GetCounters(string alias) => await GetCounters(await Get(alias));
+
+
+  /// <inheritdoc />
+  public async Task<Paged<NumberCounter>> GetCounters<T>(string alias = null) where T : Number, new() => await GetCounters(await Get<T>(alias));
+
+
+  protected async Task<Paged<NumberCounter>> GetCounters(Number number)
+  {
+    if (number == null || number.Hash.IsNullOrEmpty())
+    {
+      return new(0, 1, 1);
+    }
+
+    List<NumberCounter> items = new();
+    Dictionary<string, long?> counters = await Store.Session.CountersFor(number).GetAllAsync();
+
+    foreach (var counter in counters)
+    {
+      long value = counter.Value ?? 0;
+
+      int.TryParse(counter.Key, out int year);
+      bool isPassed = year > 0 && year < DateTimeOffset.Now.Year;
+
+      items.Add(new()
+      {
+        Count = value,
+        Key = counter.Key,
+        Value = isPassed ? "@shop.number.fields.counterlist.yearpassed" : Compile(number, value + 1)
+      });
+    }
+
+    return new(items, items.Count, 1, items.Count);
+  }
+
+
+  /// <inheritdoc />
+  public async Task<Paged<Number>> GetAll(ListQuery<Number> query = default)
+  {
+    query ??= new();
+
+    List<Number> result = new();
+    List<Number> numbers = await Store.LoadAll();
+
+    foreach (NumberType type in RegisteredTypes)
+    {
+      Number number = numbers.FirstOrDefault(x => x.Flavor == type.Alias);
+
+      if (number == null)
+      {
+        number = type.Construct(type) as Number;
+        number.Flavor = type.Alias;
+      }
+
+      number.Name = type.Name;
+      number.IsActive = true;
+
+      result.Add(number);
+    }
+
+    return new(result.Paging(query.Page, query.PageSize).ToList(), result.Count, query.Page, query.PageSize);
+  }
+
+
+  /// <inheritdoc />
+  public async Task<string> Next<T>(string alias = null, DateTimeOffset? date = null) where T : Number, new()
+  {
+    T preset = await Get<T>(alias);
+
+    if (!IsStored(preset))
+    {
+      NumberType type = RegisteredTypes.FirstOrDefault(x => x.FlavorType == typeof(T) && (alias.IsNullOrEmpty() || x.Alias.Equals(alias, StringComparison.InvariantCultureIgnoreCase)));
+      preset = await Create<T>(type);
+    }
+
+    string counterName = GetCounterName(preset);
+
+    // get a matching counter
+    var counters = Store.Session.CountersFor(preset);
+    long? storedCount = await counters.GetAsync(counterName);
+
+    // calculate new value
+    bool hasValue = storedCount.HasValue;
+    long oldValue = hasValue ? storedCount.Value : preset.StartNumber;
+    long incrementBy = hasValue ? 1 : 0;
+    long newValue = oldValue + incrementBy;
+
+    // increment the value and store it in database
+    counters.Increment(counterName, hasValue ? incrementBy : newValue);
+    await Store.Session.SaveChangesAsync();
+
+    // compiles the template and returns the rendered result
+    return Compile(preset, newValue, date);
+  }
+
+
+  /// <inheritdoc />
+  public async Task Reset(string alias) => await Reset(await Get(alias));
+
+
+  /// <inheritdoc />
+  public async Task Reset<T>(string alias = null) where T : Number, new() => await Reset(await Get<T>(alias));
+
+
+  /// <inheritdoc />
+  protected async Task Reset(Number preset)
+  {
+    if (!IsStored(preset))
+    {
+      return;
+    }
+
+    string counterName = GetCounterName(preset);
+
+    // get a matching counter
+    var counters = Store.Session.CountersFor(preset);
+
+    // delete the counter
+    counters.Delete(counterName);
+    await Store.Session.SaveChangesAsync();
+  }
+
+
+  /// <inheritdoc />
+  public async Task<Result<Number>> Update(Number preset)
+  {
+    return IsStored(preset) ? await Store.Update(preset) : await Store.Create(preset);
+  }
+
+
+  /// <inheritdoc />
+  public async Task Delete(string alias)
+  {
+    Number preset = await Get(alias);
+
+    if (IsStored(preset))
+    {
+      await Store.Delete(preset);
+    }
+  }
+
+
+  /// <inheritdoc />
+  public async Task Delete<T>(string alias = null) where T : Number, new()
+  {
+    T preset = await Get<T>(alias);
+
+    if (IsStored(preset))
+    {
+      await Store.Delete(preset);
+    }
+  }
+
+
+  /// <inheritdoc />
+  public string Compile<T>(T number, long value, DateTimeOffset? date = null) where T : Number
+  {
+    string output = number.Template;
+    MatchCollection matches = templateRegex.Matches(output);
+    DateTimeOffset usedDate = date ?? DateTimeOffset.Now;
+
+    foreach (Match match in matches)
+    {
+      if (!match.Success)
+      {
+        continue;
+      }
+
+      string original = match.Value;
+      string type = match.Groups[1].Value;
+      string options = match.Groups[2].Value;
+      string result = String.Empty;
+
+      if (type == "year")
+      {
+        result = usedDate.Year.ToString();
+      }
+      else if (type == "date")
+      {
+        result = usedDate.ToString(options.IsNullOrWhiteSpace() ? "dd-MM-yyyy" : options);
+      }
+      else if (type == "number")
+      {
+        int minLength = number.MinLength > 0 && number.MinLength <= 16 ? number.MinLength : 1;
+        result = value.ToString("D" + minLength);
+      }
+      else if (type == "random")
+      {
+        int length = 5;
+        if (!options.IsNullOrWhiteSpace() && Int32.TryParse(options, out int oLength) && oLength > 0 && oLength <= 10)
+        {
+          length = oLength;
+        }
+        result = random.Next(0, Int32.MaxValue).ToString("D10").Substring(0, length);
+      }
+
+      output = output.ReplaceFirst(original, result);
+    }
+
+    return output;
+  }
+
+
+  /// <summary>
+  /// Get integration data from database
+  /// </summary>
+  protected async Task<T> Load<T>(NumberType type, Func<T> createInstance = null) where T : Number, new()
+  {
+    if (type == null)
+    {
+      return default;
+    }
+
+    T entity = await Store.Session.Query<T>().FirstOrDefaultAsync(x => x.Flavor == type.Alias && x.IsActive);
+
+    if (entity == null)
+    {
+      entity = createInstance != null ? createInstance() : new T();
+    }
+
+    entity.Name = type.Name;
+    entity.IsActive = true;
+    entity.Flavor = type.Alias;
+
+    return entity;
+  }
+
+
+  /// <summary>
+  /// Saves a new number to the database
+  /// </summary>
+  protected async Task<T> Create<T>(NumberType type, Action<T> modify = null) where T : Number, new()
+  {
+    T entity = new();
+    entity.Flavor = type.Alias;
+    entity.Name = null;
+    entity.IsActive = true;
+
+    modify?.Invoke(entity);
+
+    Result<Number> result = await Store.Create(entity);
+
+    if (!result.IsSuccess)
+    {
+      throw new Exception("Could not store number in database"); // TODO add details for logging
+    }
+
+    return (T)result.Model;
+  }
+
+
+  /// <summary>
+  /// Get the name for the current counter
+  /// </summary>
+  protected virtual string GetCounterName<T>(T number) where T : Number
+  {
+    if (!number.ResetNumberPerYear || !containsYearRegex.IsMatch(number.Template))
+    {
+      return DEFAULT_COUNTER;
+    }
+
+    return DateTimeOffset.Now.Year.ToString();
+  }
+
+
+  /// <summary>
+  /// Determines if this number comes from the database
+  /// </summary>
+  protected virtual bool IsStored<T>(T number) where T : Number
+  {
+    return number != null && !number.Hash.IsNullOrEmpty();
+  }
+}
+
+
+public interface I_NumberService
+{
+  /// <summary>
+  /// Get a number config by an alias
+  /// </summary>
+  Task<Number> Get(string alias);
+
+  /// <summary>
+  /// Get the number config of a certain type with an optional alias
+  /// </summary>
+  Task<T> Get<T>(string alias = null) where T : Number, new();
+
+  /// <summary>
+  /// Get all counters for a number
+  /// </summary>
+  Task<Paged<NumberCounter>> GetCounters(string alias);
+
+  /// <summary>
+  /// Get all counters for a number
+  /// </summary>
+  Task<Paged<NumberCounter>> GetCounters<T>(string alias = null) where T : Number, new();
+
+  /// <summary>
+  /// Get all numbers
+  /// </summary>
+  Task<Paged<Number>> GetAll(ListQuery<Number> query = default);
+
+  /// <summary>
+  /// Get the next available number for the specified template
+  /// </summary>
+  Task<string> Next<T>(string alias = null, DateTimeOffset? date = null) where T : Number, new();
+
+  /// <summary>
+  /// Resets the current counter for the specified template
+  /// </summary>
+  Task Reset(string alias);
+
+  /// <summary>
+  /// Resets the current counter for the specified template
+  /// </summary>
+  Task Reset<T>(string alias = null) where T : Number, new();
+
+  /// <summary>
+  /// Updates number properties
+  /// </summary>
+  Task<Result<Number>> Update(Number preset);
+
+  /// <summary>
+  /// Resets the whole number configuration including changes and all attached counters
+  /// </summary>
+  Task Delete(string alias);
+
+  /// <summary>
+  /// Resets the whole number configuration including changes and all attached counters
+  /// </summary>
+  Task Delete<T>(string alias = null) where T : Number, new();
+
+  /// <summary>
+  /// Renders the final output from the template and the value
+  /// </summary>
+  string Compile<T>(T number, long value, DateTimeOffset? date = null) where T : Number;
+}
\ No newline at end of file