Difference between 接受 and 接收 The first one (接受 jiēshòu) seems far more general and frequent:


我接受邀请。   I accepted the invitation.
他将接受口试。  He will take an oral examination.
他拒绝接受治疗。 He refused treatment.


The second one (接收 jiēshōu) appears to be specialized in signal reception (and expropriation), but I found the following examples too:


我接收了邀请。  I accepted the invitation.
部队未接收他。  The army rejected him.
他接收礼物。   He receives gifts.


Are the latter simple typos?
Is it possible to swap 接收 and 接受 in all these six sentences?
接受(accept) ≠ 接收(receive)


  接受 means agreeing to something
  
  接收 means getting something


I have made some amendments to the six sentences (in brackets) for clearer understanding of the meaning:


我接受(了)邀请。I accepted the invitation.
他将接受口试。He will be (accepting) an oral test.*
他拒绝接受治疗。 He refused (to accept) treatment.
我接收了邀请(函)。I received the invitation (letter).
部队未接收他。The military has yet to (receive) him.*
他接收了礼物。He received the gift.


接受 can be used in an abstract manner (邀请，口试，治疗) but 接收 has to be something physical (邀请函，他，礼物). Therefore, they can't be interchanged.

&#42; These statements may sound unnatural to native English speakers. Gloss translation is provided to give the precise meaning of 接收 and 接受, and to avoid causing confusion to learners of the Chinese language.