diff --git a/README.md b/README.md
index af80d11..0f9f358 100755
--- a/README.md
+++ b/README.md
@@ -11,7 +11,11 @@ Roulier will get a label + tracking number to your carrier for you.
 * Roulier runs on your server and call each carrier API directly.
 * You have to use your own credentials provided by each carriers.
 * Roulier is Open Source software, AGPL-3
-* Roulier integrate a multitude of carriers : Laposte, Geodis, DPD, K&N... more to come.
+* Roulier integrate a multitude of carriers
+    * French La Poste
+    * French DPD
+    * French Geodis
+    * French Chronopost
 
 ### Installation
 
@@ -65,6 +69,11 @@ from roulier import roulier
 print(roulier.get_carriers_action_available())
 ```
 
+### Known Issues
+#### French GLS carrier :
+* The glsbox webservice only manage Basic products : BP, EBP, GBP
+* In the rest webservice, the incoterms don't work
+
 
 ### Contributors
 
@@ -73,6 +82,7 @@ print(roulier.get_carriers_action_available())
 * [@damdam-s](https://github.com/damdam-s) ([Camp2Camp.com](http://camptocamp.com))
 * [@bealdav](https://github.com/bealdav) ([Akretion.com](https://akretion.com))
 * [@DylannCordel](https://github.com/DylannCordel) ([Webu.coop](https://www.webu.coop))
+* [@florian-dacosta](https://github.com/florian-dacosta) ([Webu.coop](https://akretion.com))
 
 
 ### Dependencies
diff --git a/roulier/carriers/gls_fr/glsbox/decoder.py b/roulier/carriers/gls_fr/glsbox/decoder.py
index 45d38bf..ff0ef47 100644
--- a/roulier/carriers/gls_fr/glsbox/decoder.py
+++ b/roulier/carriers/gls_fr/glsbox/decoder.py
@@ -40,7 +40,9 @@ def decode(self, response, input_payload):
 
     def exotic_serialization_to_dict(self, data):
         res = {}
-        for val in data.split("|")[1:-1]:
+        # remove start of string
+        data = re.sub(r"\\*GLS\\*", "", data)
+        for val in data.split("|")[0:-1]:
             key, value = val.split(":", 1)
             res[key] = value
         return res
@@ -107,7 +109,7 @@ def create_exception(self, result, exception, ctx_except, data_request):
 
     def validate_template(self, template_string, available_keys):
         keys2match = []
-        for match in re.findall(r"\$(T[0-9].*) ", template_string):
+        for match in re.findall(r"\$\{(T[0-9].*)\}", template_string):
             keys2match.append(match)
         unmatch = list(set(keys2match) - set(available_keys))
         not_in_tmpl_but_known_case = ["T8900", "T8901", "T8717", "T8911"]
diff --git a/roulier/carriers/gls_fr/glsbox/encoder.py b/roulier/carriers/gls_fr/glsbox/encoder.py
index 29f229b..1ff05a8 100644
--- a/roulier/carriers/gls_fr/glsbox/encoder.py
+++ b/roulier/carriers/gls_fr/glsbox/encoder.py
@@ -64,8 +64,23 @@ def merge_dict(mydict):
 class GlsEncoder(Encoder):
     """Transform input to gls compatible format."""
 
+    def _extra_input_data_processing(self, input_payload, data):
+        # Manage origin_reference from Destination and custom_sequence
+        country_code = data.get("to_address", {}).get("country")
+        seq = data.get("parcels") and data["parcels"][0].get("custom_sequence")
+        if country_code and seq:
+            product_code = country_code == "FR" and "02" or "01"
+            origin_ref = "%s%s%s%s" % (product_code, seq, "0000", country_code)
+            data["service"]["gls_origin_reference"] = origin_ref
+        return data
+
     def transform_input_to_carrier_webservice(self, data):
         merged_data = self.merge_data(data)
+        # Manage some mandatory constants...
+        merged_data["T090"] = "NOSAVE"
+        # not in documentation but comes from GLS support...
+        # T100 is destination country
+        merged_data["T082"] = merged_data["T100"] == "FR" and "UNIQUENO" or "GPDEL"
         exotic_data = self.dict_to_exotic_serialization(merged_data)
         return exotic_data
 
diff --git a/roulier/carriers/gls_fr/glsbox/templates/zpl.zpl b/roulier/carriers/gls_fr/glsbox/templates/zpl.zpl
index 920586a..ff6ebd4 100644
--- a/roulier/carriers/gls_fr/glsbox/templates/zpl.zpl
+++ b/roulier/carriers/gls_fr/glsbox/templates/zpl.zpl
@@ -1,96 +1,100 @@
 ^XA
 ^CI28
-^FWN
-^FO50,80^GB825,0,15^FS
-^FO50,102^AE,90,37^FD$T110 ^FS
-^FO360,95^GB30,105,82,^FS
-^FO375,102^AG,90,22^FR^FD$T310 ^FS
-^FO475,102^AE,90,45^FD$T100 ^FS
-^FO645,95^GB195,105,105,^FS
-^FO650,102^AE,90,30^FR^FD$T101 ^FS
-^FO50,194^GB825,0,5^FS
-
-^FO50,203^A0,90,65^FD$T320 ^FS
-^FO213,203^AB,8,10^FD$T8951 ^FS
-^FO375,203^AB,8,10^FD$T8952 ^FS
-^FO675,203^AB,8,10^FDPRODUIT^FS
-^FO210,233^A0,60,50^FD$T330 ^FS
-^FO330,222^AB,12,15^FD$T8911 ^FS
-^FO520,222^AB,12,15^FD$T8912 ^FS
-^FO390,252^AB,20,15^FD$T8913 ^FS
-^FO675,233^A0,60,50^FD$T8900 ^FS
-^FO780,233^A0,60,50^FD$T8901 ^FS
-^FO50,279^GB8250,0,5^FS
-
-^FO50,282^GB30,0,6^FS
-^FO255,282^GB30,0,6^FS
-^FO50,282^GB0,30,6^FS
-^FO285,282^GB0,30,6^FS
-
-^FO90,320^BX,4,200^FD$T8902 ^FS
-
-^FO50,510^GB30,0,6^FS
-^FO255,510^GB30,0,6^FS
-^FO50,480^GB0,30,6^FS
-^FO285,480^GB0,31,6^FS
-
-^FO650,320^BX,4,200^FD$T8903 ^FS
-
-^FO50,515^GB825,0,5^FS
-^FO50,530^A0,60,40^FD$T500 ^FS
-^FO180,545^A0,30,20^FD$T510 ^FS
-^FO210,545^A0,30,20^FD$T540 ^FS
-^FO310,545^A0,30,20^FD$T541 ^FS
-^FO370,530^A0,60,45^FD$T530 ^FS
-^FO480,530^A0,60,45^FDKG^FS
-^FO540,545^A0,30,20^FD$T8904 ^FS
-^FO570,545^A0,30,20^FD/^FS
-^FO580,545^A0,30,20^FD$T8905 ^FS
-^FO610,545^A0,30,20^FDRTG^FS
-^FO650,545^A0,30,20^FD$T520 ^FS
-^FO740,545^A0,30,20^FDV02-00^FS
-
-^FO50,590^GB825,0,5^FS
-^FO55,620^B2N,70^FD$T8717 ^FS
-
-^FO55,740^GB640,0,5^FS
-^FO55,762^A0,30,45^FD$T860 ^FS
-^FO55,800^A0,30,30^FD$T861 ^FS
-^FO55,845^A0,30,30^FD$T862 ^FS
-^FO55,890^A0,30,45^FD$T863 ^FS
-^FO55,930^A0,30,45^FD$T864 ^FS
-^FO55,970^A0,30,30^FD$T100 ^FS
-^FO150,970^A0,30,30^FD$T330 ^FS
-
-^FO55,1000^GB640,0,5^FS
-^FO55,1007^A0,20,20^FD$T8958 ^FS
-^FO150,1007^A0,20,20^FD$T8906 ^FS
-^FO560,1007^A0,20,20^FDColisage^FS
-^FO55,1035^A0,20,20^FDTel:^FS
-^FO150,1035^A0,20,20^FD$T871 ^FS
-^FO555,1035^A0,20,20^FD$T8904 ^FS
-^FO590,1035^A0,20,20^FD/^FS
-^FO600,1035^A0,20,20^FD$T8905 ^FS
-^FO55,1060^A0,20,20^FDRef:^FS
-^FO150,1060^A0,20,20^FD$T8977 ^FS
-^FO55,1090^A0,20,20^FD$T8907 ^FS
-^FO230,1090^A0,20,20^FD/^FS
-^FO240,1090^A0,20,20^FD$T8908 ^FS
-^FO525,1063^GB160,0,5^FS
-^FO525,1000^GB0,63,5^FS
-^FO55,1125^GB825,0,5^FS
-^FO690,740^GB0,390,5^FS
-^FO50,740^GB0,390,5^FS
-^FO870,535^GB0,585,5^FS
-
-^FO775,600^A0,30,20^FWR^FDExpediteur^FS^
-^FO750,600^A0,20,20^FDClient^FS^
-^FO750,750^A0,20,20^FD$T805 ^FS^
-^FO750,870^A0,20,20^FDContactId^FS^
-^FO750,970^A0,20,20^FD$T8914 ^FS^
-^FO722,600^A0,20,20^FD$T810 ^FS^
-^FO695,600^A0,20,20^FD$T821 ^FS^
-^FO695,675^A0,20,20^FD$T822 ^FS^
-^FO695,825^A0,20,20^FD$T823 ^FS^
-
-^XZ=
+^LH15,0
+^PR6
+^JMA
+^FO10,946,^GB616,137,0^FS
+^FO10,703,^GB616,244,0^FS
+^FO24,712,^A0N,24^FR^FD${T859}^FS
+^FO24,743,^A0N,43^FR^FD${T860}^FS
+^FO24,790,^A0N,31^FR^FD${T861}^FS
+^FO24,824,^A0N,31^FR^FD${T862}^FS
+^FO24,857,^A0N,43^FR^FD${T863}^FS
+^FO24,903,^A0N,31^FR^FD${T100}^FS
+^FO256,716,^A0N,18^FR^FD${T851}^FS
+^FO379,716,^A0N,18^FR^FD${T852}^FS
+^FO112,1052,^A0N,24^FR^FD${T854}^FS
+^FO18,953,^A0N,24^FR^FD${T8958}^FS
+^FO18,978,^A0N,24^FR^FD${T8959}^FS
+^FO18,1003,^A0N,24^FR^FD${T8960}^FS
+^FO112,953,^A0N,24^FR^FD${T759}^FS
+^FO112,978,^A0N,24^FR^FD${T758}^FS
+^FO112,1003,^A0N,24^FR^FD${T920}^FS
+^FO112,1028,^A0N,24^FR^FD${T921}^FS
+^FO10,444,^GB616,260,0^FS
+^FO18,1028,^A0N,24^FR^FD${T8960}^FS
+^FO18,1052,^A0N,24^FR^FD${T853}^FS
+^FO625,444,^GB162,639,0^FS
+^FO24,453,^A0N,42^FR^FD${T750}^FS
+^FO24,502,^A0N,24^FR^FD${T751}^FS
+^FO24,527,^A0N,24^FR^FD${T752}^FS
+^FO24,556,^A0N,24^FR^FD${T753}^FS
+^FO24,580,^A0N,32^FR^FD${T754}^FS
+^FO24,628,^A0N,24^FR^FD${T755}^FS
+^FO24,653,^A0N,24^FR^FD${T756}^FS
+^FO24,678,^A0N,24^FR^FD${T757}^FS
+^FO100,903,^A0N,31^FR^FD${T330}^FS
+^FO280,903,^A0N,31^FR^FD${T864}^FS
+^FO630,514,^A0R,18^FR^FD${T822}^FS
+^FO630,607,^A0R,18^FR^FD${T823}^FS
+^FO754,451,^A0R,18^FR^FD${T800}^FS
+^FO727,451,^A0R,24^FR^FD${T810}^FS
+^FO754,572,^A0R,18^FR^FD${T8957}^FS
+^FO754,692,^A0R,18^FR^FD${T8915}^FS
+^FO754,840,^A0R,18^FR^FD${T8965}^FS
+^FO754,946,^A0R,18^FR^FD${T8914}^FS
+^FO701,451,^A0R,18^FR^FD${T811}^FS
+^FO677,451,^A0R,18^FR^FD${T812}^FS
+^FO654,451,^A0R,18^FR^FD${T820}^FS
+^FO630,451,^A0R,18^FR^FD${T821}^FS
+^FO570,12,^GB224,90,90^FS
+^FO248,13,^GB71,89,71^FS
+^FO4,5,^GB790,9,9^FS
+^FO27,120,^A0N,62^FR^FD${T320}^FS
+^FO183,139,^A0N,43^FR^FD${T330}^FS
+^FO25,28,^A0N,74^FR^FD${T110}^FS
+^FO450,30,^A0N,74^FR^FD${T105}^FS
+^FO7,102,^GB787,6,6^FS
+^FO263,25,^A0N,80^FR^FD${T310}^FS
+^FO216,110,^A0N,18^FR^FD${T8951}^FS
+^FO384,110,^A0N,18^FR^FD${T8952}^FS
+^FO387,147,^A0N,34^FR^FD${T8913}^FS
+^FO8,184,^GB787,6,6^FS
+^FO8,395,^GB783,9,9^FS
+^FO50,217,^BY4^BXN,4,200^FR^FD${T8902}^FS
+^FO595,214,^BY4^BXN,4,200^FR^FD${T8903}^FS
+^FO8,190,^GB24,8,8^FS
+^FO8,196,^GB8,16,8^FS
+^FO8,372,^GB8,16,8^FS
+^FO8,387,^GB24,8,8^FS
+^FO229,387,^GB24,8,8^FS
+^FO244,196,^GB8,16,8^FS
+^FO228,190,^GB24,8,8^FS
+^FO245,372,^GB8,16,8^FS
+^FO580,28,^A0N,80^FR^FD${T101}^FS
+^FO303,352,^A0N,37^FR^FD${T400}^FS
+^FO720,416,^A0N,18^FR^FDB2.00.0^FS
+^FO616,416,^A0N,18^FR^FD${T520}^FS
+^FO168,416,^A0N,18^FR^FD${T540}^FS
+^FO32,408,^A0N,31^FR^FD${T500}^FS
+^FO342,408,^A0N,37^FR^FD${T530}^FS
+^FO131,407,^A0N,31^FR^FD${T510}^FS
+^FO273,416,^A0N,18^FR^FD${T541}^FS
+^FO481,416,^A0N,18^FR^FD${T8904}^FS
+^FO525,416,^A0N,18^FR^FD${T8905}^FS
+^FO510,416,^A0N,18^FR^FD/^FS
+^FO572,416,^A0N,18^FR^FDRTG^FS
+^FO268,221,^BY3,2.0,125,^B2N,125,N,N^FR^FD${T8916}^FS
+^FO624,135,^A0N,43^FR^FD${T202}^FS
+^FO735,135,^A0N,43^FR^FD${T205}^FS
+^FO579,135,^A0N,43^FR^FD${T204}^FS
+^FO763,135,^A0N,43^FR^FD${T201}^FS
+^FO670,135,^A0N,43^FR^FD${T200}^FS
+^FO577,135,^A0N,43^FR^FD${T203}^FS
+^FO425,407,^A0N,37^FR^FDkg^FS
+^FO18,1090,^A0N,20^FR^FD${T1945}^FS
+^FO18,1115,^A0N,20^FR^FD${T1946}^FS
+^FO18,1140,^A0N,20^FR^FD${T1947}^FS
+^FO18,1165,^A0N,20^FR^FD${T1948}^FS
+^PQ1
+^XZ