diff --git a/address_utils/address_utils.go b/address_utils/address_utils.go
index f955fedcfd195a81ef7474cfd02eded969a92521..f8c5556b68cb4daae53d889fc3a8730260fd22fe 100644
--- a/address_utils/address_utils.go
+++ b/address_utils/address_utils.go
@@ -8,7 +8,7 @@ import (
 	"strings"
 )
 
-// MD5HashOfAddress calculates and returns the MD5 hash of the entered address, lat and lng concatenated together. If lat and lng is blank, it is only the hash of the entered address
+// MD5HashOfAddress m(E,L,L) - calculates and returns the MD5 hash of the entered address, lat and lng concatenated together. If lat and lng is blank, it is only the hash of the entered address
 func MD5HashOfAddress(enteredAddress string, lat *float64, lng *float64) string {
 	valueToHash := enteredAddress
 	if lat != nil && lng != nil {
@@ -18,7 +18,7 @@ func MD5HashOfAddress(enteredAddress string, lat *float64, lng *float64) string
 	return fmt.Sprintf("%X", md5.Sum([]byte(valueToHash)))
 }
 
-// MD5HashOfLowerCaseEnteredAddress calculates and returns the MD5 hash of a string after preparing the string properly.
+// MD5HashOfLowerCaseEnteredAddress m(e) - calculates and returns the MD5 hash of a string after preparing the string properly.
 func MD5HashOfLowerCaseEnteredAddress(enteredAddress string) string {
 	valueToHash := cleanLowerCaseAddress(enteredAddress)
 	return fmt.Sprintf("%X", md5.Sum([]byte(valueToHash)))
diff --git a/string_utils/string_utils.go b/string_utils/string_utils.go
index 5ae232bb71d807655058f012b0e33b5073f19f33..2778aea8883ec6a4dd139b6c515fec7b8c382d8c 100644
--- a/string_utils/string_utils.go
+++ b/string_utils/string_utils.go
@@ -82,4 +82,30 @@ func UnwrapString(s *string) string {
 		return ""
 	}
 	return *s
+}
+
+//trim specified strings, replacing empty string with nil
+func Trimp(sp *string) *string {
+	if sp == nil {
+		return nil
+	}
+	s := strings.TrimSpace(*sp)
+	if s == "" {
+		return nil
+	}
+	return &s
+}
+
+//concatenate all specified non-empty strings with ", " separators
+func Concatp(args ...*string) string {
+	s := ""
+	for _, arg := range args {
+		if args != nil && *arg != "" {
+			if s != "" {
+				s += ", "
+			}
+			s += *arg
+		}
+	}
+	return s
 }
\ No newline at end of file