diff --git a/backend/api/v1/modules/a76/general_catalogs/signatures/__init__.py b/backend/api/v1/modules/a76/general_catalogs/signatures/__init__.py
new file mode 100644
index 00000000..4ee29dba
--- /dev/null
+++ b/backend/api/v1/modules/a76/general_catalogs/signatures/__init__.py
@@ -0,0 +1,3 @@
+"""
+Módulo de firmas
+"""
diff --git a/backend/api/v1/modules/a76/general_catalogs/signatures/dto.py b/backend/api/v1/modules/a76/general_catalogs/signatures/dto.py
new file mode 100644
index 00000000..4524f91c
--- /dev/null
+++ b/backend/api/v1/modules/a76/general_catalogs/signatures/dto.py
@@ -0,0 +1,44 @@
+"""
+DTOs (Data Transfer Objects) para módulo de firmas
+"""
+
+from typing import Optional
+
+from pydantic import BaseModel, Field
+
+
+class SignatureCreateDTO(BaseModel):
+    """DTO para crear una firma"""
+
+    code: str = Field(..., max_length=10, description="Signature code")
+    signature: Optional[str] = Field(
+        None, max_length=1000, description="Signature")
+    photo_path: Optional[str] = Field(
+        None, max_length=1000, description="Photo path")
+
+    class Config:
+        from_attributes = True
+
+
+class SignatureUpdateDTO(BaseModel):
+    """DTO para actualizar una firma"""
+
+    signature: Optional[str] = Field(
+        None, max_length=1000, description="Signature")
+    photo_path: Optional[str] = Field(
+        None, max_length=1000, description="Photo path")
+
+    class Config:
+        from_attributes = True
+
+
+class SignatureResponseDTO(BaseModel):
+    """DTO para responder con datos de una firma"""
+
+    id: int
+    code: str
+    signature: Optional[str] = None
+    photo_path: Optional[str] = None
+
+    class Config:
+        from_attributes = True
diff --git a/backend/api/v1/modules/a76/general_catalogs/signatures/models.py b/backend/api/v1/modules/a76/general_catalogs/signatures/models.py
new file mode 100644
index 00000000..8a0fddb6
--- /dev/null
+++ b/backend/api/v1/modules/a76/general_catalogs/signatures/models.py
@@ -0,0 +1,37 @@
+"""
+Modelos ORM para gestión de firmas
+"""
+
+from typing import Optional
+
+from api.v1.common.base_models import TenantScopedMixin
+from core.database import Base
+from sqlalchemy import Integer, PrimaryKeyConstraint, String, UniqueConstraint
+from sqlalchemy.orm import Mapped, mapped_column
+
+
+class Signature(Base, TenantScopedMixin):
+    """
+    Modelo para la tabla Signature - Firmas
+    """
+
+    __tablename__ = "signatures"  # GFirmas
+    __table_args__ = (
+        PrimaryKeyConstraint("id", name="signatures_pkey"),
+        UniqueConstraint("code", name="signatures_code_unique"),
+        {"schema": "a76"},
+    )
+
+    # Primary key
+    id: Mapped[int] = mapped_column(
+        Integer, primary_key=True, autoincrement=True)
+
+    # Signature code (unique)
+    code: Mapped[str] = mapped_column(String(10), nullable=False, unique=True)
+
+    # Signature information
+    signature: Mapped[Optional[str]] = mapped_column(String(1000))
+    photo_path: Mapped[Optional[str]] = mapped_column(String(1000))
+
+    def __repr__(self):
+        return f"<Signature(id={self.id}, code={self.code})>"
diff --git a/backend/api/v1/modules/a76/general_catalogs/signatures/routes.py b/backend/api/v1/modules/a76/general_catalogs/signatures/routes.py
new file mode 100644
index 00000000..9ac77be0
--- /dev/null
+++ b/backend/api/v1/modules/a76/general_catalogs/signatures/routes.py
@@ -0,0 +1,131 @@
+"""
+Rutas para gestión de firmas
+"""
+
+from fastapi import APIRouter, Depends, HTTPException, Query, status
+from sqlalchemy.orm import Session
+
+from core.database import get_core_db
+from .dto import SignatureCreateDTO, SignatureResponseDTO, SignatureUpdateDTO
+from .models import Signature
+from .service import SignatureService
+
+router = APIRouter(prefix="/signatures", tags=["signatures"])
+
+
+@router.get(
+    "",
+    response_model=dict,
+    summary="Get all signatures",
+)
+async def get_all_signatures(
+    skip: int = Query(0, ge=0),
+    limit: int = Query(50, ge=1, le=100),
+    code: str = Query(None),
+    db: Session = Depends(get_core_db),
+):
+    """Get all signatures with optional filtering and pagination"""
+    filters = {}
+    if code:
+        filters["code"] = code
+
+    signatures, total = SignatureService.get_all(db, skip, limit, filters)
+
+    return {
+        "data": [SignatureResponseDTO.model_validate(sig) for sig in signatures],
+        "total": total,
+        "skip": skip,
+        "limit": limit,
+    }
+
+
+@router.get(
+    "/{signature_id}",
+    response_model=SignatureResponseDTO,
+    summary="Get signature by ID",
+)
+async def get_signature(
+    signature_id: int,
+    db: Session = Depends(get_core_db),
+):
+    """Get a signature by its ID"""
+    signature = SignatureService.get_by_id(db, signature_id)
+    if not signature:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Signature not found",
+        )
+    return SignatureResponseDTO.model_validate(signature)
+
+
+@router.get(
+    "/code/{code}",
+    response_model=SignatureResponseDTO,
+    summary="Get signature by code",
+)
+async def get_signature_by_code(
+    code: str,
+    db: Session = Depends(get_core_db),
+):
+    """Get a signature by its code"""
+    signature = SignatureService.get_by_code(db, code)
+    if not signature:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Signature not found",
+        )
+    return SignatureResponseDTO.model_validate(signature)
+
+
+@router.post(
+    "",
+    response_model=SignatureResponseDTO,
+    status_code=status.HTTP_201_CREATED,
+    summary="Create signature",
+)
+async def create_signature(
+    signature_data: SignatureCreateDTO,
+    db: Session = Depends(get_core_db),
+):
+    """Create a new signature"""
+    signature = SignatureService.create(db, signature_data)
+    return SignatureResponseDTO.model_validate(signature)
+
+
+@router.put(
+    "/{signature_id}",
+    response_model=SignatureResponseDTO,
+    summary="Update signature",
+)
+async def update_signature(
+    signature_id: int,
+    signature_data: SignatureUpdateDTO,
+    db: Session = Depends(get_core_db),
+):
+    """Update a signature"""
+    signature = SignatureService.update(db, signature_id, signature_data)
+    if not signature:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Signature not found",
+        )
+    return SignatureResponseDTO.model_validate(signature)
+
+
+@router.delete(
+    "/{signature_id}",
+    status_code=status.HTTP_204_NO_CONTENT,
+    summary="Delete signature",
+)
+async def delete_signature(
+    signature_id: int,
+    db: Session = Depends(get_core_db),
+):
+    """Delete a signature"""
+    success = SignatureService.delete(db, signature_id)
+    if not success:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND,
+            detail="Signature not found",
+        )
+    return None
diff --git a/backend/api/v1/modules/a76/general_catalogs/signatures/service.py b/backend/api/v1/modules/a76/general_catalogs/signatures/service.py
new file mode 100644
index 00000000..f278a635
--- /dev/null
+++ b/backend/api/v1/modules/a76/general_catalogs/signatures/service.py
@@ -0,0 +1,134 @@
+"""
+Capa de servicio para lógica de negocio de firmas
+"""
+
+import logging
+from typing import Any, Dict, List, Optional, Tuple
+
+from fastapi import HTTPException
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.orm import Session
+
+from .dto import SignatureCreateDTO, SignatureResponseDTO, SignatureUpdateDTO
+from .models import Signature
+
+logger = logging.getLogger(__name__)
+
+
+class SignatureService:
+    """Servicio para gestión de firmas"""
+
+    def __init__(self, db: Session):
+        self.db = db
+
+    @staticmethod
+    def get_all(
+        db: Session,
+        skip: int = 0,
+        limit: int = 50,
+        filters: Optional[Dict[str, Any]] = None,
+    ) -> Tuple[List[Signature], int]:
+        """Get all signatures with pagination"""
+        query = db.query(Signature)
+
+        if filters:
+            if filters.get("code"):
+                query = query.filter(
+                    Signature.code.ilike(f"%{filters['code']}%"))
+
+        total = query.count()
+        signatures = query.offset(skip).limit(limit).all()
+
+        return signatures, total
+
+    @staticmethod
+    def get_by_id(db: Session, signature_id: int) -> Optional[Signature]:
+        """Get signature by ID"""
+        return db.query(Signature).filter(Signature.id == signature_id).first()
+
+    @staticmethod
+    def get_by_code(db: Session, code: str) -> Optional[Signature]:
+        """Get signature by code"""
+        return db.query(Signature).filter(Signature.code == code).first()
+
+    @staticmethod
+    def create(db: Session, signature_data: SignatureCreateDTO) -> Signature:
+        """Create a new signature"""
+        try:
+            db_signature = Signature(
+                **signature_data.model_dump(exclude_unset=True))
+
+            db.add(db_signature)
+            db.commit()
+            db.refresh(db_signature)
+
+            return db_signature
+
+        except IntegrityError as e:
+            db.rollback()
+            logger.error(f"IntegrityError creating signature: {str(e)}")
+            raise HTTPException(
+                status_code=400,
+                detail="Signature code already exists",
+            )
+        except Exception as e:
+            db.rollback()
+            logger.error(f"Error creating signature: {str(e)}")
+            raise HTTPException(
+                status_code=500, detail="Error creating signature")
+
+    @staticmethod
+    def update(
+        db: Session, signature_id: int, signature_data: SignatureUpdateDTO
+    ) -> Optional[Signature]:
+        """Update a signature"""
+        try:
+            db_signature = db.query(Signature).filter(
+                Signature.id == signature_id
+            ).first()
+
+            if not db_signature:
+                return None
+
+            for key, value in signature_data.model_dump(exclude_unset=True).items():
+                setattr(db_signature, key, value)
+
+            db.commit()
+            db.refresh(db_signature)
+
+            return db_signature
+
+        except IntegrityError as e:
+            db.rollback()
+            logger.error(f"IntegrityError updating signature: {str(e)}")
+            raise HTTPException(
+                status_code=400,
+                detail="Error updating signature",
+            )
+        except Exception as e:
+            db.rollback()
+            logger.error(f"Error updating signature: {str(e)}")
+            raise HTTPException(
+                status_code=500, detail="Error updating signature")
+
+    @staticmethod
+    def delete(db: Session, signature_id: int) -> bool:
+        """Delete a signature"""
+        try:
+            db_signature = db.query(Signature).filter(
+                Signature.id == signature_id
+            ).first()
+
+            if not db_signature:
+                return False
+
+            db.delete(db_signature)
+            db.commit()
+
+            return True
+
+        except Exception as e:
+            db.rollback()
+            logger.error(f"Error deleting signature: {str(e)}")
+            raise HTTPException(
+                status_code=500, detail="Error deleting signature")