Cyfeiriad dychwelyd mail receipt section dgfe abertawe sa99 1du

I think you're asking for the return address for a mail receipt section in Abertawe (Swansea), SA99 1DU.

The return address for a mail receipt section in Abertawe, SA99 1DU is:

Cyfeiriad Dychwelyd: Abertawe Mail Centre SA99 1DU

Please note that this is a general address and may not be specific to a particular organization or department. If you're looking for a specific return address, you may want to check with the organization or department you're trying to contact.