With version 22.0.202322.65580 of Document Customizer- it is possible to include Customer no. in the Payment ID.
To include the Customer no. Mark the setup Include Customer no. in Payment method.
The syntax used when including in the Customer no. is : DDDDDDCCCCCCCM.
D= Document no. , C = Customer No. , M = Modulus Check digit
If document type is also selected the syntax is: DDDDDDCCCCCCTM
D= Document no. , C = Customer No. , M = Modulus Check digit, T= Document Type
If using Continia's Payment Management- The Payment Reference should be set up to match the above syntax.
If Document No. or Customer no. is to long compared to the definition, a Payment ID can't be calculated, and an error will be shown. If Document No. or Customer no. on they other and are shorter, 0 will be set in front of the whole ID- to match the full length of 14 characters.