diff --git a/internal/service/requests/submit_form.go b/internal/service/requests/submit_form.go
index dfa98a4..af388df 100644
--- a/internal/service/requests/submit_form.go
+++ b/internal/service/requests/submit_form.go
@@ -21,17 +21,17 @@ func NewSubmitForm(r *http.Request) (req resources.SubmitFormRequest, err error)
 
 	errs := validation.Errors{
 		"data/type":                validation.Validate(req.Data.Type, validation.Required, validation.In(resources.SUBMIT_FORM)),
-		"data/attributes/name":     validation.Validate(req.Data.Attributes.Name, validation.Required, is.Alpha),
-		"data/attributes/surname":  validation.Validate(req.Data.Attributes.Surname, validation.Required, is.Alpha),
+		"data/attributes/name":     validation.Validate(req.Data.Attributes.Name, validation.Required),
+		"data/attributes/surname":  validation.Validate(req.Data.Attributes.Surname, validation.Required),
 		"data/attributes/id_num":   validation.Validate(req.Data.Attributes.IdNum, validation.Required, is.Digit),
 		"data/attributes/birthday": validation.Validate(req.Data.Attributes.Birthday, validation.Required, validation.Date("01-02-2006")),
-		"data/attributes/citizen":  validation.Validate(req.Data.Attributes.Citizen, validation.Required, is.Alpha),
+		"data/attributes/citizen":  validation.Validate(req.Data.Attributes.Citizen, validation.Required),
 		"data/attributes/visited":  validation.Validate(req.Data.Attributes.Visited, validation.Required),
 		"data/attributes/purpose":  validation.Validate(req.Data.Attributes.Purpose, validation.Required),
-		"data/attributes/country":  validation.Validate(req.Data.Attributes.Country, validation.Required, is.Alpha),
-		"data/attributes/city":     validation.Validate(req.Data.Attributes.City, validation.Required, is.Alpha),
+		"data/attributes/country":  validation.Validate(req.Data.Attributes.Country, validation.Required),
+		"data/attributes/city":     validation.Validate(req.Data.Attributes.City, validation.Required),
 		"data/attributes/address":  validation.Validate(req.Data.Attributes.Address, validation.Required),
-		"data/attributes/postal":   validation.Validate(req.Data.Attributes.Postal, validation.Required, is.Digit),
+		"data/attributes/postal":   validation.Validate(req.Data.Attributes.Postal, validation.Required, is.Digit, validation.Length(5, 5)),
 		"data/attributes/phone":    validation.Validate(req.Data.Attributes.Phone, validation.Required),
 		"data/attributes/email":    validation.Validate(req.Data.Attributes.Email, validation.Required, is.Email),
 		"data/attributes/image":    validation.Validate(req.Data.Attributes.Image, validation.Required, is.Base64, validation.Length(0, maxImageSize)),