Delivery VL01N and VL02N transaction Save and Post Goods Issue (PGI) Button Validation

On Save button validation spot

Tcode                           : SE19
BADI Name                 : LE_SHP_DELIVERY_PROC
Implementation Name : ZDELIVERY_SAVE   "Any name you can give
Enhancement Name     : ZDELIVERY_SAVE_VALIDATION  "Any name you can give
Under Method              : SAVE_DOCUMENT_PREPARE

Like Below you can create

On Post Goods Issue (PGI) button validation spot

Tcode                           : SE19
BADI Name                 : LE_SHP_GOODSMOVEMENT
Implementation Name : ZDELIVERY_PGI   "Any name you can give
Enhancement Name     : ZDELIVERY_PGI_VALIDATION  "Any name you can give
Under Method              : CHANGE_INPUT_HEADER_AND_ITEMS

Same as above screen short you can create for PGI button validation